1To pour a drink (such as sake or tea) into a cup for someone; to serve a drink or dish out food. Narrower in scope than the reading そそぐ (which shares the same kanji): this reading is used specifically for pouring beverages or food into a vessel, often when serving another person.
コーヒーをカップに注ぐ。
Pour coffee into the cup.
彼女は客に紅茶を注いだ。
She poured tea for the guest.
上司のグラスにビールを注ぐのは新人の役目だ。
Pouring beer into the boss's glass is the new employee's job.
皿にスープを注いでテーブルに出した。
She ladled soup into a bowl and put it on the table.