Intransitive verb; Transitive verb

to open; to undo; to unseal; to unpack

Intransitive verb; Transitive verb

to bloom; to unfold; to spread out

Intransitive verb; Transitive verb

to open (for business, e.g. in the morning)

Intransitive verb; Transitive verb

to be wide (gap, etc.); to widen

Transitive verb

to hold (meeting, party, etc.); to give; to open

Transitive verb

to found (nation, dynasty, sect, etc.); to open (a new business); to set up; to establish; to start

Transitive verb

to open (ports, borders, etc.)

Transitive verb

to open (an account)

Transitive verb

to open up (new land, path, etc.); to clear; to develop

Transitive verb; Computing

to open (a file, etc.)

Transitive verb; Mathematics

to extract (root); to reduce (equation)

Transitive verb; Food, cooking; As 魚を開く

to cut open (fish)

Transitive verb

to change (kanji into hiragana)

Intransitive verb

to flare (e.g. skirt)

Intransitive verb; Sports; As 体が開く, 肩が開く, etc.

to slacken (into a poor posture)

Word usually written using kana alone; Intransitive verb; Go (game); Usu. ヒラく

to extend

開ける only; Transitive verb

to open (a door, etc.); to unwrap (e.g. parcel, package); to unlock

開ける only; Transitive verb

to open (for business, etc.)

Transitive verb; Esp. 空ける

to empty; to remove; to make space; to make room

Transitive verb; Esp. 空ける

to move out; to clear out

Transitive verb; Esp. 空ける

to be away from (e.g. one's house); to leave (temporarily)

Intransitive verb; Esp. 明ける

to dawn; to grow light

Intransitive verb; Esp. 明ける

to end (of a period, season)

Intransitive verb; Esp. 明ける

to begin (of the New Year)

Intransitive verb; Esp. 明ける

to leave (one's schedule) open; to make time (for)

Intransitive verb

to make (a hole); to open up (a hole)

Intransitive verb

development; evolution; progression; unfolding; (plot) twist

Intransitive verb

expansion; spreading out; extending; deployment; building up

Intransitive verb; Mathematics

expansion (of an algebraic expression)

Intransitive verb; Mathematics

development (of a three-dimensional shape)

Intransitive verb; Computing

extraction (of compressed data); decompression; unpacking

Business

sharing (information)

Prefix

open; beginning

to open one's mouth (to talk); to (start to) tell

start; commencement; beginning; initiation

Intransitive verb; Esp. 開く

to open (e.g. doors)

Intransitive verb; Esp. 開く

to open (e.g. business, etc.)

Intransitive verb; Esp. 空く

to be empty

Intransitive verb; Esp. 空く

to be vacant; to be available; to be free

Intransitive verb; Esp. 明く

to be open (e.g. neckline, etc.)

Intransitive verb; Esp. 明く

to have been opened (of one's eyes, mouth, etc.)

Intransitive verb; Esp. 明く

to come to an end

Transitive verb; Esp. 明く

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

Intransitive verb

to have a hole; to form a gap; to have an interval (between events)

development; exploitation (of resources)

reopening; resumption; restarting

to open (one's eyes) wide