“to turn off / to disappear” in Japanese is 消, read shou, ki, ke (しょう, き, け). It is a Grade 3 Kyōiku kanji, taught in year 3 of Japanese elementary school, and appears in words such as 消える (to disappear).
What does 消 mean?
電気を消す。
Same sound, different character — the classic trap. Compare them side by side: