suck in
phrasal verb3 コロケーション平均頻度: 7.4
お腹をへこませる
to pull the muscles of your stomach inwards to make it appear flatter
お腹を平らに見せるために腹筋を内側に引き締めること
to take a short, quick breath, often in surprise or shock
suck in air7.0
to draw air into the lungs; to inhale