trinus

Latin

**Latin numbers ^(edit)**
	30
← 2	III 3	4 → ^{[a], [b]}
Cardinal: trēs Ordinal: tertius Adverbial: ter Proportional: triplus Multiplier: triplex Distributive: ternus, trīnus Collective: terniō Fractional: triēns

From Proto-Italic *triznos, itself from Proto-Indo-European *trís (“thrice”) and the adjective-forming suffix *-nós (see Latin -nus), equivalent to Latin ter +‎ -nus (compare the alternative form ternus).

trīnus (feminine trīna, neuter trīnum); first/second-declension numeral

	masculine	feminine	neuter	masculine	feminine	neuter
	singular			plural
nominative	trīnus	trīna	trīnum	trīnī	trīnae	trīna
genitive	trīnī	trīnae	trīnī	trīnum trīnōrum	trīnum trīnārum	trīnum trīnōrum
dative	trīnō	trīnae	trīnō	trīnīs
accusative	trīnum	trīnam	trīnum	trīnōs	trīnās	trīna
ablative	trīnō	trīnā	trīnō	trīnīs
vocative	trīne	trīna	trīnum	trīnī	trīnae	trīna

Italian: trino, trina
Middle French: trin
- → Middle English: trine, tryne
  - English: trine
Sicilian: trinu
⇒ Vulgar Latin: *trēna
- Aragonese: trena
- Catalan: trena
- Franco-Provençal: trena
- Occitan: trena

“trinus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
“trinus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
trinus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.