Godan verb, intransitive verb, transitive verb

  1. to open, to undo, to unseal, to unpack.
  2. to bloom, to unfold, to spread out.
  3. to open (for business, e.g. in the morning).
  4. to be wide (gap, etc.), to widen.

Godan verb, transitive verb

  1. to hold (meeting, party, etc.), to give, to open.
  2. to found (nation, dynasty, sect, etc.), to open (a new business), to set up, to establish, to start.
  3. to open (ports, borders, etc.).
  4. to open (an account).
  5. to open up (new land, path, etc.), to clear, to develop.
  6. Computer terminology.to open (a file, etc.).
  7. Mathematics.to extract (root), to reduce (equation).
  8. Food term.to cut open (fish). As 魚を開く.
  9. to change (kanji into hiragana).

Godan verb, intransitive verb

  1. to flare (e.g. skirt).
  2. Sports term.to slacken (into a poor posture). As 体が開く, 肩が開く, etc..

Variations

Pronunciation Kanji Kana Is Common
 
開く ひらく

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)