もっぱらにする

expression, suru verb (irregular)

devote oneself to; make a point of

Used when someone concentrates on a single activity or makes something their main focus, often with a sense of deliberate choice.

• 彼かれは研けん究きゅうをもっぱらにしている。

  He devotes himself to research.

• 最さい近きんは健けん康こう管かん理りをもっぱらにしています。

  Lately I've been making health management my main focus.

expression, suru verb (irregular)

do as one pleases; act selfishly

Carries a negative nuance of self-centered behavior; often implies ignoring others' wishes or social norms.

• 彼かれは会かい議ぎで自じ分ぶんの意い見けんをもっぱらにして、他ほかの人ひとの話はなしを聞きかなかった。

  He pushed his own opinion at the meeting and didn't listen to others.

• 子こどもがわがままをもっぱらにする時じ期きもある。

  There are times when children act entirely selfishly.