ガクガクtrembling (with fear, cold, etc.), shaking, chattering (of teeth), coming loose, wobbling

抜(ぬ)けそうな乳歯(にゅうし)がガクガクします。

The baby tooth that seems to be coming loose is wobbling. {trembling (with fear, cold, etc.), shaking, chattering (of teeth), coming loose, wobbling}

冷(つめ)たい風(かぜ)のせいで体(からだ)がガクガク震(ふる)えている。

Due to the cold wind, my body is trembling. {trembling (with fear, cold, etc.), shaking, chattering (of teeth), coming loose, wobbling}

幽霊(ゆうれい)を見(み)た後(のち)から膝(ひざ)のガクガクが止(と)まりません。

After seeing a ghost, my knees won't stop trembling. {trembling (with fear, cold, etc.), shaking, chattering (of teeth), coming loose, wobbling}

机(つくえ)の足(あし)がガクガクで不安定(ふあんてい)なので、机(つくえ)を交換(こうかん)しました。

The desk was unstable due to its wobbling legs, so I replaced it. {trembling (with fear, cold, etc.), shaking, chattering (of teeth), coming loose, wobbling}

殺人(さつじん)の現場(げんば)を目(ま)の当(あ)たりにした時(とき)、恐怖(きょうふ)で全身(ぜんしん)がガクガクした。

When I witnessed the scene of the murder, my whole body was trembling with fear. {trembling (with fear, cold, etc.), shaking, chattering (of teeth), coming loose, wobbling}