板いたにつく

expression, godan verb (-ku)

get used to a role; become second nature; be at home in a role

Idiomatic expression originally from the theater, meaning that an actor's performance has become natural and polished, as if they are at home on the stage. Now used broadly for any skill or role that one has mastered to the point of looking effortless.

• 彼かれの司し会かいぶりはすっかり板いたについている。

  His hosting style has really become second nature to him.

• 新しん入にゅう社しゃ員いんも仕し事ごとが板いたについてきた。

  The new employee has gotten used to the job and is performing naturally.