歓かん心しんを買かう

expression, godan verb (-u)

curry favor; win someone's favor; ingratiate oneself

Often implies trying to gain goodwill through flattery or pleasing actions. Used in both personal and professional contexts.

• 彼かれは上じょう司しの歓かん心しんを買かおうと、いつもお世せ辞じを言いっている。

  He is always flattering his boss to curry favor.

• 新しん人じんは先せん輩ぱいの歓かん心しんを買かうために、積せっ極きょく的てきに手伝てつだいを申もうし出でた。

  The newcomer actively offered to help in order to win the senior colleague's favor.