A noun meaning an expression of regret or admission of fault. Often used in formal contexts like 謝りの言葉 or 謝りの手紙.
He offered a sincere apology.
Writing a letter of apology is difficult.
earnest apology; profuse apology
Derived from the verb 謝る (あやまる, 'to apologize'), which is a native Japanese word. The noun form uses the continuative stem of the verb.