Where does “unsincerely” come from?

unsincerely (English) comes from English unsincere, from English sincere, from Middle French sincere, from Latin sincērus, from Proto-Italic senkairos, from Proto-Indo-European ḱer-, from Proto-Indo-European kr̥-, from Proto-Indo-European ker- — army.

Ancestry of “unsincerely”, step by step

unsincerely traces back through two separate lines of ancestry.

via English unsincere

StepLanguageWordMeaning
1Englishunsincereinsincere
2EnglishsincereGenuine; meaning what one says or does;...
3Middle Frenchsinceresincere (genuinely meaning what one says or does)
4Latinsincērusclean, pure, sound
5Proto-Italicsenkairos
6Proto-Indo-Europeanḱer-to grow, to make grow, to nourish; to plait,...
7Proto-Indo-Europeankr̥-to turn, to bend
8Proto-Indo-Europeanker-army

via English ly

StepLanguageWordMeaning
1EnglishlyAbbreviation of light-year
2VietnameselyAlternative spelling of li
Every word from Proto-Indo-European ker-Every word from Proto-Indo-European kr̥-Every word from Proto-Indo-European ḱer-
unsincerely — Etymology, Origin & Word History | Etymology Explorer