sincere (English)

Where does "sincere" come from?

The English word 'sincere' traces its history to the Latin 'sincerus', meaning 'genuine'[1]. This Latin adjective likely evolved from a Proto-Indo-European compound combining 'sem-' meaning 'together' and 'ḱer-' meaning 'grow'[1][3]. The term entered English via Middle French 'sincere', which is first attested around 1441[1][2]. While a common folk etymology suggests the word comes from 'sine' meaning 'without' and 'cera' meaning 'wax', this is incorrect[1].

Open questions

• The derivation from a Proto-Italic *senkairos is linguistically problematic because it does not account for the expected vowel development in Latin. [3]
• The second element of the compound is theorized to derive from an unattested adjective related to the first part of 'caerimonia', though this remains debated. [3]

Full etymology tree

• sincere (English), 'Genuine; meaning what one says or does; heartfelt.'
  • borrowed sincere (Middle French), 'sincere (genuinely meaning what one says or does)'
    • borrowed sincerus (Latin), 'clean, pure, sound'

Ancestors

• *sem- (Proto-Indo-European)
• sincere (Middle French)
• sincerus (Latin)

Sources

1. sincere (English) - Wiktionary
2. sincere (Middle French) - Wiktionary
3. sincerus (Latin) - Wiktionary

Updated August 2026

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Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris