ガクガク Parts ガク ガク #11,098 Inflections of ガクガク Class Na-adjective Stem Inflected ending ✕ Link copied! ガクガク [1] Meaning Shirabe ① Adverb To-adverb Na-adjective Suru verb Onomatopoeic trembling (with fear, cold, etc.); shaking; chattering (of teeth) 少すこし走はしっただけで膝ひざがガクガクしてるよ。 All I did was run a little and now my knees are wobbly. ② Adverb To-adverb Na-adjective Suru verb Onomatopoeic coming loose; wobbling Forms ガクガク#11,098ガクガクがくがく#16,581がくがく