1. Adverb (fukushi), Adverb taking the 'to' particle

   with a clatter; with a rattle; with a clank

   Onomatopoeic or mimetic word

   皿はガチャガチャと床に落ちた。

2. Adverb (fukushi)

   persistently (complaining, etc.); annoyingly; (going) on and on

   Onomatopoeic or mimetic word

3. Na-adjective (keiyodoshi)

   messy; cluttered; untidy

   Onomatopoeic or mimetic word

4. Noun

   capsule-toy vending machine; capsule toy

   Trademarksee カプセルトイ

5. Mecopoda nipponensis (species of katydid)

   see クツワムシ

Also written がちゃがちゃgachagacha