開始【かいし】
start, commencement, beginning, initiation
開く【ひらく】
to open, to undo, to unseal, to unpack, to bloom, to unfold, to spread out, to open (for business, e.g. in the morning), to be wide (gap, etc.), to widen, to hold (meeting, party, etc.), to give, to open, to found (nation, dynasty, sect, etc.), to open (a new business), to set up, to establish, to start, to open (ports, borders, etc.), to open (an account), to open up (new land, path, etc.), to clear, to develop, to open (a file, etc.), to extract (root), to reduce (equation), to cut open (fish), to change (kanji into hiragana), to flare (e.g. skirt), to slacken (into a poor posture)
開く【あく】
to open (e.g. doors), to open (e.g. business, etc.), to be empty, to be vacant, to be available, to be free, to be open (e.g. neckline, etc.), to have been opened (of one's eyes, mouth, etc.), to come to an end, to open (one's eyes, mouth, etc.), to have a hole, to form a gap, to have an interval (between events)
開ける【はだける】
to open (e.g. one's robe), to bare (e.g. one's chest), to expose, to open up (of clothing), to be exposed, to open wide (one's legs, eyes, mouth, etc.), to stretch
開ける【あける】
to open (a door, etc.), to unwrap (e.g. parcel, package), to unlock, to open (for business, etc.), to empty, to remove, to make space, to make room, to move out, to clear out, to be away from (e.g. one's house), to leave (temporarily), to dawn, to grow light, to end (of a period, season), to begin (of the New Year), to leave (one's schedule) open, to make time (for), to make (a hole), to open up (a hole)
開ける【ひらける】
to open out (of a view, scenery, etc.), to spread out, to become clear (of a road, visibility, etc.), to open up, to improve (of luck, prospects, etc.), to get better, to develop (of a town, civilization, etc.), to become civilized, to modernize, to grow, to advance (of knowledge, ideas, etc.), to be sensible, to be understanding, to be enlightened, to open (of a new road, railway, etc.), to be opened to traffic, to become populous, to become densely built, to become bustling
開発【かいはつ】
development, exploitation (of resources)
展開【てんかい】
development, evolution, progression, unfolding, (plot) twist, expansion, spreading out, extending, deployment, building up, expansion (of an algebraic expression), development (of a three-dimensional shape), extraction (of compressed data), decompression, unpacking
開閉【かいへい】
opening and shutting, opening and closing
公開【こうかい】
opening to the public, making available to the public, exhibiting, unveiling, release (of a film, information, etc.), disclosure, publication
再開【さいかい】
reopening, resumption, restarting
開放【かいほう】
opening (a door, window, etc.), leaving open, opening up (e.g. to the public), allowing (public) access
開幕【かいまく】
raising the curtain, opening (of an event), start, beginning
開会【かいかい】
opening of a meeting
開票【かいひょう】
counting ballots, tally (of votes)
開示【かいじ】
release (e.g. information), disclosure (legal), show, indication, display
開設【かいせつ】
establishment, opening, setting up, inauguration
打開【だかい】
break in the deadlock
開戦【かいせん】
outbreak of war, starting a war
開き【ひらき】
opening, gap, dried and opened fish
