i-adjective
unrefusable; cannot refuse; undeclinable
Describes a request, offer, or situation that one cannot turn down, often due to social pressure, obligation, or personal inability to say no. Functions as an i-adjective derived from the negative potential form of 断る.
See also: 断る (ことわる)
上司からの頼みは断れない。
I can't refuse a request from my boss.
彼女の誘いはいつも断れないんだ。
I can never say no to her invitations.
Negative potential form of the verb 断る (ことわる, 'to refuse'), used as an i-adjective. The form follows regular godan conjugation: 断る → 断れない.