(かぎ)

かぎ
noun
key, lock
1. key
A metal instrument for opening a lock.
(かぎ)(わす)れた
I forgot my key.
I locked up before going out.
I lost my key and couldn't get into my house.
2. key, clue
Something crucial for solving a problem.
The key to success is effort.
I found the key to solving the problem.

COMMON EXPRESSIONS:

COMPOUNDS:

  • 合鍵(あいかぎ): spare/duplicate key
  • 鍵穴(かぎあな): keyhole
  • 鍵盤(けんばん): keyboard (piano)
  • 鍵括弧(かぎかっこ): Japanese quotation marks「」

FIGURATIVE USE:
成功(せいこう)(かぎ) (the key to success) demonstrates how (かぎ) is used metaphorically for something crucial or decisive, similar to English "key."