BBG Chapter 10 — Third Declension¶
Learn the third-declension paradigm for consonant-stem nouns (neuter and masculine/feminine), including the characteristic genitive singular endings that reveal the lexical stem. Identify the dative plural sigma-stem compression and the nominative singular irregularities. Third declension nouns are frequent in the NT and essential for reading the Johannine Prologue, the Pauline corpus, and Hebrews.
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Basics of Biblical Greek Grammar, Mounce, 4th Edition
1. Introduction to the Third Declension¶
The third declension covers nouns whose stems end in a consonant (or in -ι or -υ for i-stems and u-stems). Third-declension nouns can be masculine, feminine, or neuter. The key challenge is that third-declension nouns have irregular-looking nominative singular forms; the genitive singular reveals the true stem.
Rule for finding the stem: Take the genitive singular form and remove the ending -ος. What remains is the stem to which all other endings attach.
Example: σάρξ, σαρκός → stem = σαρκ-
2. Third-Declension Endings¶
Masculine / Feminine (non-neuter) Endings¶
| Case | Singular | Plural |
|---|---|---|
| Nominative | varies (see paradigms) | -ες |
| Genitive | -ος | -ων |
| Dative | -ι | -σι(ν) |
| Accusative | -α | -ας |
| Vocative | varies | -ες |
Neuter Endings¶
| Case | Singular | Plural |
|---|---|---|
| Nominative | varies | -α |
| Genitive | -ος | -ων |
| Dative | -ι | -σι(ν) |
| Accusative | = Nom. | -α |
| Vocative | = Nom. | -α |
Note: The neuter rule holds: nominative, accusative, and vocative are always identical within a number. The genitive and dative are the same for masculine/feminine and neuter in the 3rd declension.
3. Consonant Stem Types¶
The nominative singular of 3rd-declension nouns changes depending on how the stem-final consonant interacts with the nominative -ς ending:
| Stem Type | Stem ends in | + Nom -ς | Example |
|---|---|---|---|
| Labial | π, β, φ | π/β/φ + ς → ψ | — |
| Velar | κ, γ, χ | κ/γ/χ + ς → ξ | σάρξ (σαρκ- + ς → σάρξ) |
| Dental | τ, δ, θ | dental + ς → dental dropped | χάρις (χαριτ- + ς, τ dropped) |
| Liquid | λ, ρ | no change | αἰών, αἰῶν- |
| Nasal | ν | ν dropped before ς | — |
4. Common 3rd-Declension Paradigms¶
σάρξ, σαρκός (f.) — flesh (velar stem σαρκ-)¶
| Case | Singular | Plural |
|---|---|---|
| Nom | σάρξ | σάρκες |
| Gen | σαρκός | σαρκῶν |
| Dat | σαρκί | σαρξί(ν) |
| Acc | σάρκα | σάρκας |
αἰών, αἰῶνος (m.) — age, eternity (liquid stem αἰων-)¶
| Case | Singular | Plural |
|---|---|---|
| Nom | αἰών | αἰῶνες |
| Gen | αἰῶνος | αἰώνων |
| Dat | αἰῶνι | αἰῶσι(ν) |
| Acc | αἰῶνα | αἰῶνας |
χάρις, χάριτος (f.) — grace (dental stem χαριτ-)¶
| Case | Singular | Plural |
|---|---|---|
| Nom | χάρις | χάριτες |
| Gen | χάριτος | χαρίτων |
| Dat | χάριτι | χάρισι(ν) |
| Acc | χάριτα | χάριτας |
σῶμα, σώματος (n.) — body (dental stem σωματ-)¶
| Case | Singular | Plural |
|---|---|---|
| Nom | σῶμα | σώματα |
| Gen | σώματος | σωμάτων |
| Dat | σώματι | σώμασι(ν) |
| Acc | σῶμα | σώματα |
πνεῦμα, πνεύματος (n.) — spirit, wind (dental stem πνευματ-)¶
| Case | Singular | Plural |
|---|---|---|
| Nom | πνεῦμα | πνεύματα |
| Gen | πνεύματος | πνευμάτων |
| Dat | πνεύματι | πνεύμασι(ν) |
| Acc | πνεῦμα | πνεύματα |
ὄνομα, ὀνόματος (n.) — name (dental stem ονοματ-)¶
| Case | Singular | Plural |
|---|---|---|
| Nom | ὄνομα | ὀνόματα |
| Gen | ὀνόματος | ὀνομάτων |
| Dat | ὀνόματι | ὀνόμασι(ν) |
| Acc | ὄνομα | ὀνόματα |
Note: The neuter -α nominative/accusative singular looks like a 1st-declension ending but belongs to the 3rd declension. The genitive singular -ατος is the reliable diagnostic for neuter dental-stem nouns (body, spirit, name, etc.).
5. The Definite Article with 3rd-Declension Nouns¶
The definite article follows its own paradigm regardless of the noun's declension. For 3rd-declension nouns, the article is indispensable for identifying case:
| Case | Masc./Fem. Sg. | Masc./Fem. Pl. | Neut. Sg. | Neut. Pl. |
|---|---|---|---|---|
| Nom | ὁ / ἡ | οἱ / αἱ | τό | τά |
| Gen | τοῦ / τῆς | τῶν | τοῦ | τῶν |
| Dat | τῷ / τῇ | τοῖς / ταῖς | τῷ | τοῖς |
| Acc | τόν / τήν | τούς / τάς | τό | τά |
6. Third-Declension I-Stem Nouns¶
Some 3rd-declension nouns have stems ending in -ι. The most important is πόλις, πόλεως (f., "city").
πόλις, πόλεως (f.) — city (i-stem)¶
| Case | Singular | Plural |
|---|---|---|
| Nom | πόλις | πόλεις |
| Gen | πόλεως | πόλεων |
| Dat | πόλει | πόλεσι(ν) |
| Acc | πόλιν | πόλεις |
Note: The genitive singular of i-stem nouns is -εως (not -ος). This is one reason i-stem nouns need to be memorized separately. Other common i-stem nouns: δύναμις (power), κρίσις (judgment), πίστις (faith).
7. The Adjective πᾶς (all, every) — 3rd/1st/3rd Declension¶
The adjective πᾶς uses 3rd-declension endings for masculine and neuter and 1st-declension for feminine.
| Case | Masc. Sg. | Fem. Sg. | Neut. Sg. | Masc. Pl. | Fem. Pl. | Neut. Pl. |
|---|---|---|---|---|---|---|
| Nom | πᾶς | πᾶσα | πᾶν | πάντες | πᾶσαι | πάντα |
| Gen | παντός | πάσης | παντός | πάντων | πασῶν | πάντων |
| Dat | παντί | πάσῃ | παντί | πᾶσι(ν) | πάσαις | πᾶσι(ν) |
| Acc | πάντα | πᾶσαν | πᾶν | πάντας | πάσας | πάντα |
Note: πᾶς in the predicate position means "all" (πᾶς ὁ λαός = "all the people"). In the attributive position it means "the whole" (ὁ πᾶς λαός = "the whole people"). Without an article it means "every" (πᾶς ἄνθρωπος = "every man").
8. Identifying 3rd-Declension Forms — Strategy¶
- If the form ends in -ος (no accent circumflex), it is likely genitive singular.
- If the form ends in -ι, it is likely dative singular.
- If the form ends in -ες, it is likely nominative plural (m/f).
- If the form ends in -α (short), it is likely accusative singular (m/f) or nominative/accusative neuter plural.
- If the form ends in -σι(ν), it is likely dative plural.
- Always check the article for disambiguation.