揺るぐ

(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) 不確かである、または弱い(be unsure or weak; "Their enthusiasm is faltering")(be unsure or weak)

⇒彼らの熱意は衰えている(be unsure or weak)

(3) 崩れるようにためらって動く(move hesitatingly, as if about to give way)

(4) 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)

(5) 前後または横に動く(move back and forth or sideways; "the ship was rocking"; "the tall building swayed"; "She rocked back and forth on her feet")(move back and forth or sideways)

⇒彼女は前後に揺れながら立っていた(move back and forth or sideways)

(6) 急な痙攣を引き起こす衝撃または原因(move or cause to move with a sudden jerky motion)

(7) あちこちに揺れる(sway to and fro)