- 決める【きめる】 - to decide, to choose, to determine, to make up one's mind, to resolve, to set one's heart on, to settle, to arrange, to set, to appoint, to fix, to clinch (a victory), to decide (the outcome of a match), to persist in doing, to go through with, to always do, to have made a habit of, to take for granted, to assume, to dress up, to dress to kill, to dress to the nines, to carry out successfully (a move in sports, a pose in dance, etc.), to succeed in doing, to immobilize with a double-arm lock (in sumo, judo, etc.), to eat or drink something, to take illegal drugs 
- 決まる【きまる】 - to be decided, to be settled, to be fixed, to be arranged, to be unchanging, to be the same (as always), to be fixed, to be set, to be a fixed rule, to be destined, to be a convention, to be a custom, to be common knowledge, to be well executed (of a manoeuvre in a sport, game, etc.), to go well, to succeed, to connect (of a punch), to look good (of clothing), to look sharp, to be stylish, to suit one, to be held in place (of a hairdo), to be struck and held (of a pose in kabuki) 
- 解決【かいけつ】 - settlement, solution, resolution 
- 決して【けっして】 - (not) ever, (not) by any means, (not) in the least, (not) in any way, (not) at all 
- 決断【けつだん】 - decision, determination 
- 決定【けってい】 - decision, determination 
- 対決【たいけつ】 - confrontation, showdown 
- 決まり【きまり】 - rule, regulation, settlement, conclusion, end, agreement, arrangement, habit, custom, habitual way, countenance in front of another person, face, love relationship between a customer and a prostitute 
- 決勝【けっしょう】 - decision of a contest, finals (in sports) 
- 決着【けっちゃく】 - conclusion, decision, end, settlement 
- 判決【はんけつ】 - judicial decision, judgement, judgment, sentence, decree 
- 決意【けつい】 - decision, determination, resolution 
- 決心【けっしん】 - determination, resolution 
- 解決策【かいけつさく】 - solution, solution strategy 
- 決勝戦【けっしょうせん】 - championship game, finals (of a tournament), deciding round 
- 決闘【けっとう】 - duel, shoot-out 
- 準決勝【じゅんけっしょう】 - semifinal 
- 決戦【けっせん】 - decisive battle, deciding match, play-off 
- 決定的【けっていてき】 - definite, final, decisive, conclusive 
- 決議【けつぎ】 - resolution, vote, decision