優柔不断|ゆうじゅうふだんyuujuufudan[0]heiban (flat)

1. na-adjective, no-adjectiveindecisive; irresolute; shilly-shally; vacillating
   彼かれの優柔ゆうじゅう不断ふだんさにイライラした。↗

   I was irritated by his indecision.

• 1.
  Synonym煮え切らないにえきらないCasualColloquial. Points to a vague, wishy-washy attitude that drags on, while 「優柔不断」 is about lacking the ability to decide.
• 2.
  Synonym躊躇ちゅうちょWrittenWritten/formal prose. Hesitation or wavering, usually momentary; 「優柔不断」 centers on a general lack of decisiveness.
• 3.
  Synonym不決断ふけつだんWrittenWritten/formal prose. Means an inability to decide, but it is rarely used; 「優柔不断」 is the more common choice.
• 4.
  Related因循いんじゅんWrittenWritten/formal prose. Suggests clinging to old customs and letting things drag; 「優柔不断」 centers on being unable to make up one's mind.
• 5.
  RelatedためらいNeutralNeutral. A momentary hesitation before acting, whereas 「優柔不断」 describes an overall lack of decisiveness.
• 6.
  Related逡巡しゅんじゅんWrittenWritten/formal prose. Hesitating and holding back from action; 「優柔不断」 is about lacking decisiveness.
• 7.
  Related遅疑逡巡ちぎしゅんじゅんWrittenA written four-character idiom for lingering in doubt and indecision; 「優柔不断」 centers on the lack of decisiveness itself.

Default to 「優柔不断」 for being unable to make up one's mind — it covers both personality and specific decisions. Use 「煮え切らない」 for a vague, wishy-washy attitude, and 「ためらう」 or 「躊躇」 for a momentary hesitation; the rest are rare written words.

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

1. ぐずぐずしていて決断力けつだんりょくが少すくないこと。