English Reference
adverb

sincerely

adv.
US /sɪnˈsɪɹɫi/ UK /sɪnsˈiəli/ sin·cere·ly

  1. 01 B1 Intermediate

    in a way that is honest and shows you really mean what you say.

    in a genuine and earnest manner, indicating that the speaker's feelings or intentions are truthful.

    Simple

    I sincerely hope that you feel better soon after your surgery.

    In context

    The CEO sincerely apologised for the technical failure, acknowledging the significant disruption it had caused to the company's long-term clients.

    insincerelyfalsely
  2. 02 B1 Intermediate Formal

    a polite way to end a formal letter or email before you sign your name.

    a conventional formulaic closing for formal correspondence, typically used when the recipient is addressed by name.

    Simple

    Sincerely, Sarah Jenkins.

    In context

    The candidate concluded the cover letter with 'Sincerely,' followed by his full name and contact information as per the standard professional protocol.

    Usage

    Usually appears as 'Sincerely,' or 'Yours sincerely,' at the very end of a letter.

    Teacher's tip

    While 'Sincerely' is standard in American English for most formal mail, British English traditionally distinguishes between 'Sincerely' (known recipient) and 'Faithfully' (unknown recipient).

    Pitfall
    Sincerely yours, John Smith (to a stranger) Yours faithfully, John Smith

    In British English, use 'Sincerely' when you know the person's name and 'Faithfully' when you start with 'Dear Sir/Madam'.


From sincere + -ly, from Latin sincērus (“pure, clean, sound”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin sincērus
Level B1 · Intermediate
Frequency Frequent
Updated