taru-adjective, adverb taking the 'to' particle
perfect composure; calm and collected
Archaic yojijukugo describing a state of unshakable calmness, often used in classical or literary contexts. Functions as a taru-adjective or adverb with と.
彼は神色自若として、何事もなかったかのように振る舞った。
He remained perfectly composed and acted as if nothing had happened.