sincerus

Latin

Alternative forms

syncerus (medieval)

Etymology

From Proto-Italic *senkairos, from Proto-Indo-European *sem- (compare Latin simplex, and Sanskrit सम (sama, “whole, together”)) and *ḱer- (“grow”) (compare Sanskrit किर् (kir, “pour out”)). According to De Vaan, the second part of the compound derives from the unattested adjective *caerus found in the first part of caerimōnia.

Pronunciation

(Classical) IPA^(key): /sinˈkeː.rus/, [s̠ɪŋˈkeːrʊs̠]

(Ecclesiastical) IPA^(key): /sinˈt͡ʃe.rus/, [sin̠ʲˈt͡ʃɛːrus]

Adjective

sincērus (feminine sincēra, neuter sincērum, comparative sincērior, adverb sincērē or sincēriter); first/second-declension adjective

clean, pure, sound.
uninjured, whole.
real, natural.
genuine, sincere.

Declension

First/second-declension adjective.

Case / Gender	Masculine	Feminine	Neuter	Masculine	Feminine	Neuter
Number	Singular			Plural
Nominative	sincērus	sincēra	sincērum	sincērī	sincērae	sincēra
Genitive	sincērī	sincērae	sincērī	sincērōrum	sincērārum	sincērōrum
Dative	sincērō	sincērae	sincērō	sincērīs
Accusative	sincērum	sincēram	sincērum	sincērōs	sincērās	sincēra
Ablative	sincērō	sincērā	sincērō	sincērīs
Vocative	sincēre	sincēra	sincērum	sincērī	sincērae	sincēra

Derived terms

īnsincērus
sincēritās

Descendants

Aragonese: sencero
Catalan: sencer
Occitan: sencer
Italian: sincero
Sardinian: sincheru
Sicilian: sinzeru
→ Albanian: sinqertë
→ Catalan: sincer
→ Middle French: sincere
- → English: sincere
- French: sincère
→ Piedmontese: sincer
→ Portuguese: sincero
→ Romanian: sincer
→ Spanish: sincero

References

“sincerus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
“sincerus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
sincerus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
Walther von Wartburg (1928–2002), “sincērus”, in Französisches Etymologisches Wörterbuch (in German), volume 11: S–Si, page 640