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Third Declension.
15
| arbŏr | arbŏr-ĭs | f. | tree | |
| carcĕr | carcĕr-ĭs | m. | gaol | |
| pătĕr | pătr-ĭs | m. | father | |
| lăbŏr | lăbōr-ĭs | m. | work | |
| sanguī̆s | sanguĭn-ĭs | m. | blood | |
| lĕō | lĕōn-ĭs | m. | lion | |
| ōrdō | ōrdĭn-ĭs | m | rank | |
| ĭmāgō | ĭmāgĭn-ĭs | f. | likeness | |
| caespĕs | caespĭt-ĭs | m. | turf | |
| aetās | aetās-ĭs | f. | age | |
| virtūs | virtūt-ĭs | f. | virtue | |
| trabs | trăb-ĭs | f. | plank | |
| iūdex | iūdĭc-ĭs | m. | judge | |
| pāx | pāc-ĭs | f. | peace | |
| fax | făc-ĭs | f. | torch | |
| rādīx | rādīc-ĭs | f. | root | |
| lēx | lēg-ĭs | f. | law |
Most Nouns in -ō form Gen. in -ōnĭs: but those in -dō, -gō have -ĭnĭs. So also hŏmō̆, hŏmĭn-ĭs (m. or f.) human being.
§ 23. Neuter Nouns. (1) Parisyllabic. sĕdīl-ĕ seat, Gen. sĕdīl-ĭs.
| Sing. | Plur. | |
| N.V.A. | sĕdīl-ĕ | sĕdīl-ĭă |
| G. | sĕdīl-ĭs | sĕdīl-ĭum |
| D. | sĕdīl-ī | sĕdīl-ĭbŭs |
| Abl. | sĕdīl-ī | sĕdīl-ĭbŭs |
Like sĕdīlĕ are declined Neuter Nouns ending in -ăl, -ăr which were originally Parisyllabic and ended in -ālĕ, -ārĕ, ex.: ănĭmăl, Gen. ănĭmāl-ĭs living thing, animal.
