How to say "decisive" in Japanese

• 果断かだんCommon
  na-adjective, nounDescribes 'decisive' as a personal quality: someone who makes up their mind quickly and acts boldly, without hesitation. It fits contexts of decision-making and decisive action rather than things that settle an issue.
• 決然けつぜんCommon
  taru-adjective, adverb (with と)Covers 'decisive' in the sense of resolute and firm: a determined, unwavering attitude or manner. It characterizes a person's stance rather than something that settles an outcome.
• 決定的けっていてきCommon
  na-adjectiveUse this when 'decisive' means settling a question or outcome: conclusive evidence, a decisive moment, or a crucial difference. It describes facts or factors that determine a result, not a person's manner.
  きっと無罪むざいになるだけの決定的けっていてき切り札きりふだを隠し持かくしもっているに違ちがいない。↗

  I'm sure he has something up his sleeve.

Use 決定的 when 'decisive' means settling an outcome, as with evidence or a crucial moment; 果断 describes a person who decides and acts quickly and boldly; 決然 describes a firm, resolute attitude or stance.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 果断かだんdecisive
• 決然けつぜんdecisive
• 決定的けっていてきdefinite
• 天下分け目てんかわけめfateful
• 線の太いせんのふといstrong-nerved
• 直截ちょくせつdecisive
• 大きいおおきいimportant