taru-adjective, adverb taking the 'to' particle
self-possessed; calm and composed
Literary or formal word describing a person's dignified, unhurried composure. Often used in the adverbial form 悠揚と.
彼はどんな時でも悠揚としている。
He remains calm and composed no matter what.
悠揚とした態度で質問に答えた。
He answered the questions with a self-possessed demeanor.