断然|だんぜんdanzen[0]heiban (flat)

1. adverb, taru-adjectivefirmly; flatly; resolutely; decisively; absolutely; definitely
2. adverbdefinitely (wrong, different, etc.); absolutely
3. adverbby far; far and away; by a long shot; hands down
   彼女かのじょはクラスの中なかで、断然だんぜん歌うたがいちばんうまかった。↗

   She was by far the best singer in the class.

• Synonym断固だんこWrittenWritten/formal. Firm and unyielding in attitude, as in 「断固反対する」; unlike 「断然」, it has no sense of being clearly better or far ahead.
• Synonym確固かっこWrittenWritten/formal. Firm and unshakeable, mostly in the pattern 「確固たる」, as in 「確固たる信念」; it describes settled resolve, not decisive action.
• Synonym断じてだんじてNeutralAdverb used mostly with a negative, as in 「断じて許さない」, for an emphatic 'never'; stronger and more absolute than 「断然」.
• SynonymきっぱりNeutralMeans flatly and without hedging, as in 「きっぱり断る」; it stresses a clear-cut attitude, ideal for refusing or settling something outright.
• Synonym頑としてがんとしてWrittenA set phrase, written/formal, meaning stubbornly, often with a negative, as in 「頑として聞かない」; it implies refusing to budge.
• Synonym絶対にぜったいにNeutralEveryday adverb meaning absolutely or no matter what, as in 「絶対に行く」; unlike 「断然」 it cannot describe being clearly superior.
• Related敢然かんぜんWrittenWritten/formal. Means boldly facing something, as in 「敢然と立ち向かう」; it highlights courage in the face of difficulty rather than firmness itself.
• Antonym優柔不断ゆうじゅうふだんNeutralAntonym: indecisive, as in 「優柔不断な性格」; it describes someone who cannot make up their mind, the opposite of the decisive 「断然」.
• Antonym曖昧あいまいNeutralAntonym: vague or ambiguous, as in 「曖昧な態度」; it describes an unclear stance, the opposite of 「断然」's firm, clear-cut manner.

Use 「断然」 for acting decisively or for something clearly better, as in 「断然反対」 and 「こっちの方が断然いい」. For a hard-line attitude pick 「断固」, with a negative 「断じて」, and for flat refusal 「きっぱり」; the opposite of decisive is 「優柔不断」.

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

1. 押し切おしきって何なんかを行おこなうさま。きっぱり。決然けつぜんと。絶対ぜったいに。
2. 他ほかとかなり異ことなっているさま。なみはずれたさま。段違だんちがいに。