key

On-Yomi: ケン — Kun-Yomi: かぎ

Koohii stories:

1) [mantixen] 16-2-2007(99): The metal thing you need in order to enter things you build is a key.

2) [kapalama] 5-11-2010(15): 鍵盤 key (#2761 鍵) ケン, かぎ … Parts: 金 , 建 (cf 建物 build (#391 建), 健康 healthy (#974 健)) … Story: The most important Metal in any building is the lock on the front door, and without a key you ain't getting in. This kanji means both lock and key to most Japanese people. 錠前 is technically the word for lock but it's not used in daily conversation.

3) [francajun] 15-4-2012(9): They use metal to build keys.

4) [jusenkyoguide] 10-11-2012(5): In Zelda, the gold key will let you into any building.

5) [ZxHIROxZ] 26-6-2012(4): Many have tried and failed in seeking the key to El Dorado, the land of golden buildings (Imagine if El Dorado kept up with modern times).