What does sincerest mean?
“Sincerest” is the superlative form of the adjective “sincere.” It describes someone or something regarded as the most truthful, genuine, earnest, or free from pretence, particularly when expressing gratitude, apology, regret, or personal feeling. The word is especially frequent in formal letters, speeches, and public statements, where it lends an earnest and ceremonious tone: “Please accept my sincerest apologies.” In less formal contexts, it can also mean that a person’s feelings or intentions are more genuine than those of others. Although it comes from the same Latin root as “sincere,” its original idea of purity or authenticity was gradually extended to the modern sense of emotional candour. The superlative is useful when someone wants to make an emphatic distinction rather than simply describe conduct as sincere.
adjectiveThe superlative of sincere: most sincere, genuine, or free from pretence.
- Most sincere or genuine in feeling, intention, or expression.
"She offered her sincerest thanks to everyone who had helped."
"Please accept my sincerest apologies for the inconvenience."
"He gave the community his sincerest assurance that the problem would be addressed."
The word “sincere” began in Latin with the sense “pure” or “unadulterated,” long before it became associated with heartfelt emotion.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sincerest come from?
“Sincerest” is formed by adding the superlative suffix “-est” to “sincere.” The adjective “sincere” comes from Latin sincerus, meaning “pure,” “clean,” or “unadulterated,” and entered English with senses related to genuineness before developing its modern association with honesty and earnest feeling. “Sincerity” and “sincerely” were later formed from the same Latin source.
Related word forms
How sincerest is actually used
This superlative is especially common in formal correspondence and expressions of thanks, apology, regret, or goodwill. It can sound more emphatic and ceremonious than “very sincere.”
Easily confused with sincerest
“Sincere” means truthful or genuine, while “sincerest” is its superlative and means the most sincere.