Godan verb, intransitive verb

  1. to open (e.g. doors). Esp. 開く.
  2. to open (e.g. business, etc.). Esp. 開く.
  3. to be empty. Esp. 空く.
  4. to be vacant, to be available, to be free. Esp. 空く.
  5. to be open (e.g. neckline, etc.). Esp. 明く.
  6. to have been opened (of one's eyes, mouth, etc.). Esp. 明く.
  7. to come to an end. Esp. 明く.

Godan verb, transitive verb

Esp. 明く.
  1. to open (one's eyes, mouth, etc.).

Godan verb, intransitive verb

  1. to have a hole, to form a gap, to have an interval (between events).

Variations

Pronunciation Kanji Kana Is Common
 
開く あく
 
空く あく
 
明く あく

Contained Kanji Breakdown

open, unfold, unseal
カイ ひら.く あ.く (3rd, N4)
gate, counter for cannons
モン かど と (2nd, N2)
open, initiate, begin
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
twenty, twenty or letter H radical (no. 55)
キョウ ク にじゅう (Kentei 1)