1. So from common nouns: -
| mont-ánus, of the mountains; | móns (stem monti-), mountain. |
| veter-ánus, veteran; | vetus (stem veter-), old. |
| antelúc-ánus, before daylight; | ante lúcem, before light. |
| terr-énus, earthly; | terra, earth. |
| ser-énus, calm (of evening stillness); | sérus, late. |
| coll-ínus, of a hill; | collis, hill. |
| dív-ínus, divine; | dívus, god. |
| líbert-ínus, of the class of freedmen; | líbertus, one's freedman. |
| cui-ás, of what country? | quis, who? |
| ínfim-ás, of the lowest rank; | ínfimus, lowest. |
| for-énsis, of a market-place, or the Forum; | forum, a market-place. |
| cívi-cus, civic, of a citizen; | cívis, a citizen. |
| fullón-icus, of a fuller; | fulló, a fuller. |
| mer-ácus, pure; | merum, pure wine. |
| fémin-eus, of a woman, feminine; | fémina, a woman. |
| lact-eus, milky; | lac, milk (stem lacti-). |
| pléb-éius, of the commons, plebeian; | plébés, the commons. |
| patr-icius, patrician; | pater, father. |
2. But especially from proper nouns to denote belonging to or coming from:
| Róm-ánus, Roman; | Róma, Rome. |
| Sull-ání, Sulla's veterans; | Sulla. |
| Cyzic-éní, Cyzicenes, people of Cyzicus; | Cyzicus. |
| Ligur-ínus, of Liguria; | Liguria. |
| Arpín-ás, of Arpinum; | Arpínum. |
| Sicili-énsis, Sicilian; | Sicilia, Sicily. |
| Íli-acus, Trojan (a Greek form); | Ílium, Troy. |
| Platón-icus, Platonic; | Plató. |
| Aquil-eius, a Roman name; | Aquila. |
| Aquil-eia, a town in Italy; |
a. Many derivative adjectives with these endings have by usage become nouns: -
| Silv-ánus, M., a god of the woods; | silva, a wood. |
| membr-ána, F., skin; | membrum, limb. |
| Aemili-ánus, M., name of Scipio Africanus; | Aemilia (g=ens). |
| lani-éna, F., a butcher's stall; | lanius, butcher. |
| Aufidi-énus, M., a Roman name; | Aufidius (Aufidus). |
| inquil-ínus, M., a lodger; | incola, an inhabitant. |
| Caec-ína, used as M., a Roman name; | caecus, blind. |
| ru-ína, F., a fall; | ruó, fall (no noun existing). |
| doctr-ína, F., learning; | doctor, teacher. |
NOTE: Of these terminations, -ánus, -énus, -ínus are compounded from -nus added to a stem-vowel: as, arca, arcánus; collis, collínus. The long vowels come from a confusion with verb-stems (as in plé-nus, fíní-tus, tribú-tus), and from the noun-stem in á-: as, arcánus. A few nouns occur of similar formation, as if from verb-stems in ó- and ú-: as, colónus (coló, cf. incola), patrónus (cf. patró, -áre), tribúnus (cf. tribuó, tribus), Portúnus (cf. portus), Vacúna (cf. vacó, vacuus).