From Wiktionary, the free dictionary
From Middle Korean 개 (Yale: -kay).
개 • (-gae)
- Attaches to verbal stems to derive agentive nouns.
- 지우 (jiu-, “to erase”) + 개 (-gae) → 지우개 (jiugae, “eraser”)
- 덮 (deop-, “to cover”) + 개 (-gae) → 덮개 (deopgae, “covering”)