quārtus

From Proto-Indo-European *kʷeturtos ~ *kʷetwr̥tos (whence Ancient Greek τέταρτος (tétartos), Sanskrit चतुर्थ (caturtha) and Proto-Germanic *fedurþô), from *kʷetwóres (“four”). Cognate to quadrus (“square”), from sense “four-sided”. For the phonetic development, De Vaan cites Schrijder positing *kʷtwr̥to- > (with voicing of t) *kʷdwr̥to- > *kʷadworto-, followed by dw > w (cf. suāvis). The resulting *kʷawortos would regularly become quārtus (cf. Māvors > Mārs).

Pronunciation

• (Classical) IPA^(key): /ˈkʷaːr.tus/, [ˈkʷäːrt̪ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈkwar.tus/, [ˈkwärt̪us]

Numeral

quārtus (feminine quārta, neuter quārtum); first/second-declension numeral

1. fourth, the ordinal number after tertius and before quintus

Declension

First/second-declension adjective.

Number	Singular				Plural
Case / Gender	Masculine	Feminine	Neuter		Masculine	Feminine	Neuter
Nominative	quārtus	quārta	quārtum		quārtī	quārtae	quārta
Genitive	quārtī	quārtae	quārtī		quārtōrum	quārtārum	quārtōrum
Dative	quārtō		quārtō		quārtīs
Accusative	quārtum	quārtam	quārtum		quārtōs	quārtās	quārta
Ablative	quārtō	quārtā	quārtō		quārtīs
Vocative	quārte	quārta	quārtum		quārtī	quārtae	quārta