開く ひらく あく to open; to undo; to unseal; to unpack v5k vi vt to bloom; to unfold; to spread out v5k vi vt to open (for business, e.g. in the morning) v5k vi vt to be wide (gap, etc.); to widen v5k vi vt to hold (meeting, party, etc.); to give; to open v5k vt to found (nation, dynasty, sect, etc.); to open (a new business); to set up; to establish; to start v5k vt to open (ports, borders, etc.) v5k vt to open (an account) v5k vt to open up (new land, path, etc.); to clear; to develop v5k vt to open (a file, etc.) v5k vt comp to extract (root); to reduce (equation) v5k vt math to cut open (fish) v5k vt food to change (kanji into hiragana) v5k vt to flare (e.g. skirt) v5k vi to slacken (into a poor posture) v5k vi sports to open (e.g. doors) v5k vi to open (e.g. business, etc.) v5k vi to be empty v5k vi to be vacant; to be available; to be free v5k vi to be open (e.g. neckline, etc.) v5k vi to have been opened (of one's eyes, mouth, etc.) v5k vi to come to an end v5k vi to open (one's eyes, mouth, etc.) v5k vt to have a hole; to form a gap; to have an interval (between events) v5k vi Beginner ➥