Dictionary / Vocabulary / 達者
たっしゃ
in good health; healthy; well; fit
JLPT N1 common word
存外、口は達者なようね。
It seems like you're unexpectedly eloquent.
彼女はフランス語が達者だ。
She has a good command of French.
彼女の父は若い頃泳ぎが達者だった。
Her father could swim well when he was young.