Greek adjectives must be learned not only by meaning but also by form. Since adjectives normally agree with the nouns they modify in gender, number, and case, students must recognize how different adjective classes decline. Two major groups dominate the adjective system of New Testament Greek: first-and-second declension adjectives and third-declension adjectives.
First-and-second declension adjectives are often the easiest to recognize because their masculine and neuter forms follow second-declension patterns, while their feminine forms follow first-declension patterns. Third-declension adjectives require more careful attention because their stems and endings may differ from the more familiar first-and-second declension patterns.
Mastering these two adjective groups helps students parse adjectives accurately, identify the nouns they modify, recognize substantival adjectives, and interpret Greek phrases with greater confidence.
The Basic Rule of Adjective Agreement
The most important rule remains the same for all adjectives:
An adjective agrees with the noun it modifies in gender, number, and case.
| Agreement Category | Meaning |
|---|---|
| Gender | Masculine, feminine, or neuter |
| Number | Singular or plural |
| Case | Nominative, genitive, dative, accusative, or vocative |
The adjective’s declension pattern tells the reader how that agreement is expressed.
What Are First-and-Second Declension Adjectives?
First-and-second declension adjectives are adjectives whose masculine and neuter forms follow second-declension endings, while their feminine forms follow first-declension endings.
These are often called 2-1-2 adjectives because the pattern is:
- Masculine: second declension
- Feminine: first declension
- Neuter: second declension
A standard example is:
ἀγαθός, ἀγαθή, ἀγαθόν
“good.”
| Gender | Form | Declension Pattern |
|---|---|---|
| Masculine | ἀγαθός | Second declension |
| Feminine | ἀγαθή | First declension |
| Neuter | ἀγαθόν | Second declension |
Common First-and-Second Declension Adjectives
| Masculine | Feminine | Neuter | Meaning |
|---|---|---|---|
| ἀγαθός | ἀγαθή | ἀγαθόν | good |
| καλός | καλή | καλόν | good, noble, beautiful |
| ἅγιος | ἁγία | ἅγιον | holy |
| δίκαιος | δικαία | δίκαιον | righteous, just |
| πιστός | πιστή | πιστόν | faithful, believing |
| καινός | καινή | καινόν | new |
| πονηρός | πονηρά | πονηρόν | evil, wicked |
Declension of ἀγαθός, ἀγαθή, ἀγαθόν
The adjective ἀγαθός provides a clear model for many first-and-second declension adjectives.
| Case | Masculine Singular | Feminine Singular | Neuter Singular |
|---|---|---|---|
| Nominative | ἀγαθός | ἀγαθή | ἀγαθόν |
| Genitive | ἀγαθοῦ | ἀγαθῆς | ἀγαθοῦ |
| Dative | ἀγαθῷ | ἀγαθῇ | ἀγαθῷ |
| Accusative | ἀγαθόν | ἀγαθήν | ἀγαθόν |
Plural Forms of ἀγαθός
| Case | Masculine Plural | Feminine Plural | Neuter Plural |
|---|---|---|---|
| Nominative | ἀγαθοί | ἀγαθαί | ἀγαθά |
| Genitive | ἀγαθῶν | ἀγαθῶν | ἀγαθῶν |
| Dative | ἀγαθοῖς | ἀγαθαῖς | ἀγαθοῖς |
| Accusative | ἀγαθούς | ἀγαθάς | ἀγαθά |
Adjectives with -ος, -α, -ον
Some first-and-second declension adjectives use -α in the feminine instead of -η. This often happens when the stem ends in ε, ι, or ρ.
Example:
δίκαιος, δικαία, δίκαιον
“righteous, just.”
| Masculine | Feminine | Neuter | Meaning |
|---|---|---|---|
| ἅγιος | ἁγία | ἅγιον | holy |
| δίκαιος | δικαία | δίκαιον | righteous |
| ἴδιος | ἰδία | ἴδιον | one’s own |
Two-Termination First-and-Second Declension Adjectives
Some adjectives do not have a separate feminine form. These are called two-termination adjectives. They use one form for masculine and feminine, and another for neuter.
| Masculine/Feminine | Neuter | Meaning |
|---|---|---|
| ἄδικος | ἄδικον | unrighteous, unjust |
| ἄπιστος | ἄπιστον | unbelieving, unfaithful |
| ἔρημος | ἔρημον | desolate, deserted |
| ἄκαρπος | ἄκαρπον | fruitless |
Students should not assume that every adjective has three distinct nominative singular forms. Many adjectives use the same form for both masculine and feminine.
First-and-Second Declension Adjectives in Context
John 10:11
Ἐγώ εἰμι ὁ ποιμὴν ὁ καλός.
“I am the good shepherd.”
The adjective καλός is masculine singular nominative because it agrees with ποιμήν, which is masculine singular nominative.
Matthew 22:38
αὕτη ἐστὶν πρώτη καὶ μεγάλη ἐντολή.
“This is the first and great commandment.”
The adjective μεγάλη is feminine singular nominative because it agrees with ἐντολή.
What Are Third-Declension Adjectives?
Third-declension adjectives are adjectives whose forms follow third-declension patterns in at least part of their paradigm. They often have stems that are less obvious from the nominative form, and they may use endings different from the common -ος, -η, -ον pattern.
Common third-declension adjectives include:
- πᾶς, πᾶσα, πᾶν — all, every
- μέγας, μεγάλη, μέγα — great
- πολύς, πολλή, πολύ — much, many
- ἀληθής, ἀληθές — true
- πλήρης, πλήρες — full
Three-Termination Third-Declension Adjectives
Some third-declension adjectives have three separate gender forms.
Example:
πᾶς, πᾶσα, πᾶν
“all, every.”
| Gender | Form | Meaning |
|---|---|---|
| Masculine | πᾶς | all, every |
| Feminine | πᾶσα | all, every |
| Neuter | πᾶν | all, every |
Declension of πᾶς, πᾶσα, πᾶν
| Case | Masculine Singular | Feminine Singular | Neuter Singular |
|---|---|---|---|
| Nominative | πᾶς | πᾶσα | πᾶν |
| Genitive | παντός | πάσης | παντός |
| Dative | παντί | πάσῃ | παντί |
| Accusative | πάντα | πᾶσαν | πᾶν |
Plural Forms of πᾶς
| Case | Masculine Plural | Feminine Plural | Neuter Plural |
|---|---|---|---|
| Nominative | πάντες | πᾶσαι | πάντα |
| Genitive | πάντων | πασῶν | πάντων |
| Dative | πᾶσι(ν) | πάσαις | πᾶσι(ν) |
| Accusative | πάντας | πάσας | πάντα |
The Meaning of πᾶς with and without the Article
The adjective πᾶς is extremely important because article usage can affect its sense.
| Construction | Common Sense |
|---|---|
| πᾶς ἄνθρωπος | every person |
| πᾶς ὁ ἄνθρωπος | the whole person |
| οἱ πάντες | all the people / the whole group |
| τὰ πάντα | all things |
These distinctions must be interpreted according to context, but the article often provides an important clue.
Two-Termination Third-Declension Adjectives
Some third-declension adjectives have one form for masculine and feminine and another form for neuter.
Example:
ἀληθής, ἀληθές
“true.”
| Masculine/Feminine | Neuter | Meaning |
|---|---|---|
| ἀληθής | ἀληθές | true |
| πλήρης | πλήρες | full |
| ἀσθενής | ἀσθενές | weak, sick |
Declension Pattern of ἀληθής, ἀληθές
| Case | Masculine/Feminine Singular | Neuter Singular |
|---|---|---|
| Nominative | ἀληθής | ἀληθές |
| Genitive | ἀληθοῦς | ἀληθοῦς |
| Dative | ἀληθεῖ | ἀληθεῖ |
| Accusative | ἀληθῆ | ἀληθές |
These forms are less familiar to beginners because they do not follow the more obvious -ος, -η, -ον pattern.
Irregular Third-Declension Adjectives: μέγας and πολύς
Two very common adjectives require special attention:
- μέγας, μεγάλη, μέγα — great
- πολύς, πολλή, πολύ — much, many
Both are common and somewhat irregular.
The Adjective μέγας
The adjective μέγας means “great.” It uses different stem forms in its paradigm.
| Gender | Nominative Singular | Meaning |
|---|---|---|
| Masculine | μέγας | great |
| Feminine | μεγάλη | great |
| Neuter | μέγα | great |
Matthew 22:38
αὕτη ἐστὶν πρώτη καὶ μεγάλη ἐντολή.
“This is the first and great commandment.”
The adjective μεγάλη is feminine singular nominative because it agrees with ἐντολή.
The Adjective πολύς
The adjective πολύς means “much” or “many.” It appears frequently in narrative and teaching contexts.
| Gender | Nominative Singular | Meaning |
|---|---|---|
| Masculine | πολύς | much, many |
| Feminine | πολλή | much, many |
| Neuter | πολύ | much, many |
The plural forms such as πολλοί, πολλαί, and πολλά are especially common.
How to Recognize the Difference Between the Two Main Adjective Groups
| Feature | First-and-Second Declension | Third-Declension |
|---|---|---|
| Common lexical pattern | -ος, -η/-α, -ον | Various patterns |
| Example | ἀγαθός, ἀγαθή, ἀγαθόν | πᾶς, πᾶσα, πᾶν |
| Difficulty level | Usually easier | Often more difficult |
| Stem visibility | Usually clearer | Often less obvious |
| Common issue | Feminine -η versus -α | Irregular stems and unfamiliar endings |
Adjective Agreement in Both Groups
Whether an adjective belongs to the first-and-second declension group or the third-declension group, the rule of agreement remains the same.
Examples:
- ὁ ἀγαθὸς ἄνθρωπος — the good man
- ἡ ἀγαθὴ γυνή — the good woman
- πᾶς ὁ λαός — all the people
- πᾶσα ἡ πόλις — the whole city
- πᾶν τὸ σῶμα — the whole body
The declension pattern changes, but the agreement principle remains constant.
First-and-Second Declension Adjectives as Attributive Adjectives
First-and-second declension adjectives frequently appear in attributive position.
ὁ καλὸς ποιμήν
“The good shepherd.”
ὁ ποιμὴν ὁ καλός
“The good shepherd.”
In both cases, καλός modifies ποιμήν.
Third-Declension Adjectives as Attributive Adjectives
Third-declension adjectives also function attributively.
πᾶσα ἡ γραφή
“All Scripture” or “every Scripture.”
The adjective πᾶσα agrees with γραφή in gender, number, and case.
Adjectives as Predicate Adjectives
Both adjective groups may function predicatively.
Romans 7:12
ὥστε ὁ μὲν νόμος ἅγιος, καὶ ἡ ἐντολὴ ἁγία καὶ δικαία καὶ ἀγαθή.
“So then the law is holy, and the commandment is holy and righteous and good.”
The adjectives ἅγιος, ἁγία, δικαία, and ἀγαθή make assertions about the nouns.
Adjectives as Substantives
Both groups may function substantivally, meaning the adjective functions as a noun.
Examples:
- οἱ δίκαιοι — the righteous
- οἱ πονηροί — the wicked
- τὰ πάντα — all things
- τὸ ἀληθές — the true thing / what is true
When an adjective is substantival, the implied noun must be supplied from context.
Why Third-Declension Adjectives Cause Difficulty
Third-declension adjectives often cause difficulty because they may not look like the forms students expect. A beginner who knows ἀγαθός may easily recognize ἀγαθοῦ, but may struggle with forms such as παντός, πᾶσιν, ἀληθοῦς, or πλείων.
The key is to learn the stem and the pattern rather than relying only on the nominative form.
Common Student Mistakes
- Assuming every adjective follows -ος, -η, -ον.
- Forgetting that some adjectives have only two terminations.
- Confusing feminine -η and -α patterns.
- Failing to recognize third-declension adjective stems.
- Misidentifying πᾶς, μέγας, and πολύς as ordinary first-and-second declension adjectives.
- Ignoring agreement when word order is unusual.
- Missing substantival uses of adjectives.
- Assuming adjective position determines meaning without checking article usage.
How to Analyze First-and-Second Declension and Third-Declension Adjectives
- Identify the lexical form of the adjective.
- Determine whether it belongs to the first-and-second declension group or the third-declension group.
- Parse gender, number, and case.
- Find the noun with which it agrees.
- Determine whether the adjective is attributive, predicate, or substantival.
- Observe article usage.
- Translate according to the adjective’s function in context.
Recognizing Greek Adjective Declensions for Accurate New Testament Reading
First-and-second declension adjectives and third-declension adjectives form the backbone of Greek adjective morphology. The first group is usually easier because its masculine and neuter forms follow second-declension endings while its feminine forms follow first-declension endings. The second group requires closer attention because its stems and endings may be less familiar, yet many of its forms are extremely common and important.
Students who master both groups will be able to parse adjectives more accurately, identify agreement more confidently, distinguish attributive, predicate, and substantival usage, and interpret Greek noun phrases with greater precision. Since adjectives often shape important theological and ethical expressions, learning their declensional patterns is essential for serious reading of the Greek New Testament.