がくがく

(1) 前後に動く、または動かす(move or cause to move back and forth; "The chemist shook the flask vigorously"; "My hands were shaking")(move or cause to move back and forth)

⇒私の手は震えていた(move or cause to move back and forth)

(2) 不安定に動く(move unsteadily; "His knees wobbled"; "The old cart wobbled down the street")(move unsteadily)

⇒古いカートは、通りでぐらついた(move unsteadily)

(3) 速く震える動きで振る(shake with fast, tremulous movements; "His nostrils palpitated")(shake with fast, tremulous movements)

⇒彼の小鼻はぴくぴくしていた(shake with fast, tremulous movements)

(4) 震動であるかのように動く(move with or as if with a tremor; "his hands shook")(move with or as if with a tremor)

⇒彼の手は震えた(move with or as if with a tremor)

(5) 急速に集中的に震動するか振動する(shake or vibrate rapidly and intensively; "The old engine was juddering")(shake or vibrate rapidly and intensively)

⇒古いエンジンは激しく振動していた(shake or vibrate rapidly and intensively)

(6) 速く、不意に上下し、左右に動くまたは揺れ動く(move or jerk quickly and involuntarily up and down or sideways; "His hands were trembling when he signed the document")(move or jerk quickly and involuntarily up and down or sideways)

⇒彼が書類にサインしたとき、彼の手は震えていた(move or jerk quickly and involuntarily up and down or sideways)