adv · 4 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
Received-Pronunciation:/sɪnˈsɪəli/
General-American:/sɪnˈsɪɹli/
US:Recorded audio is listed in the source snapshot.
CMU ARPABET:S IH0 N S IH1 R L IY0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adv
Meaning 1
In a sincere or earnest manner; honestly.
Definition source: English Wiktionary via Wiktextract
Examples
I sincerely hope they make it home safely.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
adv
Meaning 2
A conventional formula for ending a letter, used when the salutation addresses the person for whom the letter is intended by his or her name.
Definition source: English Wiktionary via Wiktextract
Usage: US
Examples
Please consider the proposal carefully and let me know what you decide. Sincerely, Fred
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
adverb
Meaning 3
written formula for ending a letter
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: sincerely yours
Antonyms: none provided
4
adverb
Meaning 4
with sincerity; without pretense
Definition source: Princeton WordNet 3.0
Examples
she praised him sincerely for his victory
was unfeignedly glad to see his old teacher
we are truly sorry for the inconvenience
Meaning relationships
Synonyms: unfeignedly, truly
Antonyms: insincerely
History
Etymology
From sincere + -ly, from Latin sincērus (“pure, clean, sound”).
Across languages
Translations
30 source translations are retained for this English entry.
Bulgarian:
искрено
(iskreno)
— In a sincere or earnest manner; honestly
Bulgarian:
откровено
(otkroveno)
— In a sincere or earnest manner; honestly
Catalan:
sincerament
— In a sincere or earnest manner; honestly
Chinese Mandarin:
真诚地
— In a sincere or earnest manner; honestly
Dutch:
oprecht
— In a sincere or earnest manner; honestly
Esperanto:
sincere
— In a sincere or earnest manner; honestly
Finnish:
vilpittömästi
— In a sincere or earnest manner; honestly
Finnish:
todella
— In a sincere or earnest manner; honestly
French:
sincèrement
— In a sincere or earnest manner; honestly
Galician:
sinceramente
— In a sincere or earnest manner; honestly
Greek:
ειλικρινά
(eilikriná)
— In a sincere or earnest manner; honestly
Ancient Greek:
εἰλικρινῶς
(eilikrinôs)
— In a sincere or earnest manner; honestly
Hungarian:
őszintén
— In a sincere or earnest manner; honestly
Italian:
sinceramente
— In a sincere or earnest manner; honestly
Italian:
in fede
— In a sincere or earnest manner; honestly
Italian:
con sincerità
— In a sincere or earnest manner; honestly
Japanese:
切に
(setsu ni)
— In a sincere or earnest manner; honestly
Japanese:
誠実に
(seijitsu ni)
— In a sincere or earnest manner; honestly
Lao:
ຈິງໃຈ
(ching chai)
— In a sincere or earnest manner; honestly
Latin:
sincērē
— In a sincere or earnest manner; honestly
Portuguese:
sinceramente
— In a sincere or earnest manner; honestly
Russian:
и́скренне
(ískrenne)
— In a sincere or earnest manner; honestly
Spanish:
sinceramente
— In a sincere or earnest manner; honestly
Thai:
อย่างจริงใจ
(yàang jing jai)
— In a sincere or earnest manner; honestly
Vietnamese:
thành thật
— In a sincere or earnest manner; honestly
Vietnamese:
thật thà
— In a sincere or earnest manner; honestly
Vietnamese:
ngay thật
— In a sincere or earnest manner; honestly
Vietnamese:
chân thành
— In a sincere or earnest manner; honestly
Vietnamese:
thành khẩn
— In a sincere or earnest manner; honestly
Volapük:
ladöfiko
— In a sincere or earnest manner; honestly