English
insincerely
From insincere + -ly.
A compound of insincere + -ly
Proto-Indo-European *sem- ‘one, whole’
Proto-Italic *senkairos
Latin sincērus ‘clean, sincere’
Latin insincerus ‘not honest, not candid, insincere’
English insincere
Today it means
adv In an insincere manner.
Language periods are conventional ranges, not dates for this word.
Etymograph / insincerely