Master the two most common noun patterns in Latin — the first declension (mostly feminine, ending in -a) and the second declension (masculine -us and neuter -um). These cover a huge portion of Latin vocabulary.
Estimated Time: 40–50 minutes
First declension nouns typically end in -a in the nominative singular and are mostly feminine. The model word is puella, puellae (f.) — girl.
| Case | Singular | Plural | Use |
|---|---|---|---|
| Nominative | puella | puellae | subject |
| Genitive | puellae | puellārum | "of" |
| Dative | puellae | puellīs | "to/for" |
| Accusative | puellam | puellās | direct object |
| Ablative | puellā | puellīs | "by/with/from" |
| Vocative | puella | puellae | "O girl!" |
| Latin | English | Latin | English | |
|---|---|---|---|---|
| aqua, -ae (f.) | water | fēmina, -ae (f.) | woman | |
| terra, -ae (f.) | land, earth | via, -ae (f.) | road, way | |
| silva, -ae (f.) | forest | porta, -ae (f.) | gate | |
| fīlia, -ae (f.) | daughter | patria, -ae (f.) | homeland | |
| rēgīna, -ae (f.) | queen | īnsula, -ae (f.) | island |
A few first declension nouns are masculine despite ending in -a: agricola (farmer), nauta (sailor), poēta (poet), pirata (pirate), incola (inhabitant). They decline exactly the same way — only the gender of their adjectives changes.
Second declension masculine nouns typically end in -us. The model word is servus, servī (m.) — slave/servant.
| Case | Singular | Plural | Use |
|---|---|---|---|
| Nominative | servus | servī | subject |
| Genitive | servī | servōrum | "of" |
| Dative | servō | servīs | "to/for" |
| Accusative | servum | servōs | direct object |
| Ablative | servō | servīs | "by/with/from" |
| Vocative | serve | servī | "O slave!" |
Second declension -us nouns are the ONLY ones with a special vocative singular: -e instead of -us. Mārce! (O Marcus!), amīce! (O friend!). Exception: nouns ending in -ius use just -ī: Fīlī! (O son!), not *Fīlie.
Second declension neuter nouns end in -um. The model word is bellum, bellī (n.) — war.
| Case | Singular | Plural | Use |
|---|---|---|---|
| Nominative | bellum | bella | subject |
| Genitive | bellī | bellōrum | "of" |
| Dative | bellō | bellīs | "to/for" |
| Accusative | bellum | bella | direct object |
| Ablative | bellō | bellīs | "by/with/from" |
| Vocative | bellum | bella | (same as nom.) |
In all neuter nouns across all declensions: the nominative and accusative are always identical, and the nominative/accusative plural always ends in -a. This rule never has exceptions and will save you constantly.
| Latin | English | Latin | English | |
|---|---|---|---|---|
| amīcus, -ī (m.) | friend | bellum, -ī (n.) | war | |
| dominus, -ī (m.) | master, lord | dōnum, -ī (n.) | gift | |
| fīlius, -ī (m.) | son | templum, -ī (n.) | temple | |
| populus, -ī (m.) | people | oppidum, -ī (n.) | town | |
| deus, -ī (m.) | god | verbum, -ī (n.) | word | |
| vir, virī (m.) | man | cōnsilium, -ī (n.) | plan, advice |
Puella rēgīnam amat. — The girl loves the queen.
Servī dominī in agrīs labōrant. — The master's slaves work in the fields.
Fēminae bellum nōn amant. — The women do not love war.
Dominus servō dōnum dat. — The master gives a gift to the slave.
Aqua terrae bona est. — The water of the land is good.
1. What is the accusative singular of "puella"?
2. What is special about neuter nouns?
3. What is the vocative singular of "amīcus"?
✦ First declension: -a nouns, mostly feminine. Key endings: -a, -ae, -ae, -am, -ā (singular).
✦ Second declension masculine: -us nouns. Key endings: -us, -ī, -ō, -um, -ō, -e (singular).
✦ Second declension neuter: -um nouns. Nominative = accusative always. Plural nom/acc = -a.
✦ Some -a nouns are masculine (agricola, nauta, poēta) — memorize these exceptions.
✦ The Neuter Rule is universal across ALL declensions — learn it, love it, use it.