sincère meaning in English

sincere [sincerer, sincerest]▼◼◼◼(earnest)
adjective
[UK: sɪn.ˈsɪə(r)] [US: ˌsɪn.ˈsɪr]I'm sincere. = Je suis sincère.

heartfelt▼◼◼◻(felt or believed deeply and sincerely)
adjective
[UK: ˈhɑːt.felt] [US: ˈhɑːrt.ˌfelt]His words were heartfelt. = Ses paroles étaient sincères.

truthful▼◼◼◻(honest, and always telling the truth)
adjective
[UK: ˈtruːθ.fəl] [US: ˈtruːθ.fəl]John is truthful. = John est sincère.

candid▼◼◼◻(straightforward, open and sincere)
adjective
[UK: ˈkæn.dɪd] [US: ˈkæn.dəd]

sincerely▼◼◼◼(In a sincere or earnest manner; honestly)
adverb
[UK: sɪn.ˈsɪə.li] [US: ˌsɪn.ˈsɪr.li]I sincerely doubt that. = J'en doute sincèrement.

yours sincerely▼◼◼◼(polite formulaic end to letters)
adjective

yours faithfully▼◼◻◻(polite, formulaic end to letters)
adjective

all the best▼◼◼◼interjection