Declensions
A group of nouns whose endings change the same way is called a declension. There are five declensions in Latin. Here are some examples of the first two:
| example | ||
|---|---|---|
| ·a | first declension | puella |
| ·us or ·er | second declension | colonus, ager, puer |
Noun rules
accusative singular
| rule | example |
|---|---|
| ·a → ·am | puella → puellam |
| ·us → ·um | colonus → colonum |
| ager → agrum | |
| puer → puerum |
ablative singular
| rule | example |
|---|---|
| ·a → ·a | puella → puella |
| ·us → ·o | colonus → colono |
| ager → agro | |
| puer → puero |
nominative plural
| rule | example |
|---|---|
| ·a → ·ae | puella → puellae |
| ·us → ·i | colonus → coloni |
| ager → agri | |
| puer → pueri |
accusative plural
| rule | example |
|---|---|
| ·a → ·as | puella → puellas |
| ·us → ·os | colonus → colonos |
| ager → agros | |
| puer → pueros |
ablative plural
| rule | example |
|---|---|
| ·a → ·is | puella → puellis |
| ·us → ·is | colonus → colonis |
| ager → agris | |
| puer → pueris |