くだらない・下らないkudaranai[0]heiban (flat)

1. i-adjectivetrivial; trifling; insignificant; not worth bothering with; worthless; useless; good-for-nothing
   くだらない話はなしはもうたくさんだ。↗

   We have had enough of empty words.
2. i-adjectivestupid; nonsensical; absurd; foolish; silly

• Synonym些細ささいNeutralRefers to trivially small things, as in 「些細なこと」. It stresses smallness and need not imply worthlessness, whereas 「くだらない」 carries contempt.
• Synonym無駄むだNeutralMeans wasted effort or futility, as in 「時間の無駄」; the point is that something produces no effect, not that it is absurd or beneath notice.
• SynonymつまらないNeutralMeans dull and uninteresting, as in 「つまらない映画」; it stresses lack of interest, while 「くだらない」 stresses absurdity and worthlessness.
• Synonym無意味むいみNeutralMeans meaningless, as in 「無意味な会議」; it stresses the absence of meaning or point, a narrower claim than the general worthlessness of 「くだらない」.
• Synonym瑣末さまつWrittenRefers to trivial, minor details, as in 「瑣末な問題」; it is at home in written or formal prose.
• Synonym馬鹿らしいばからしいNeutralDescribes something so absurd it is not worth doing, as in 「馬鹿らしくてやってられない」; the stress is on the pointlessness of doing it.
• SynonymたわいないNeutralCovers silly, trivial things or childlike innocence, as in 「他愛ない話」; it is usually said without malice, unlike the dismissive 「くだらない」.
• Synonym益体もないやくたいもないNeutralA set expression meaning utterly useless or silly; it has an old-fashioned flavor and is rarely used today.
• SynonymばかばかしいNeutralMeans ridiculous or laughably absurd, as in 「馬鹿馬鹿しい話」; it is stronger than 「馬鹿らしい」.
• Related無益むえきWrittenA written, formal word for useless or futile, as in 「無益な争い」; it stresses lack of benefit and belongs to formal prose rather than casual talk.
• Antonym大切たいせつNeutralMeans important and precious; it stands at the opposite end from 「くだらない」.
• Antonym貴重きちょうNeutralMeans precious or valuable, the direct opposite of the worthlessness expressed by 「くだらない」.

Use 「くだらない」 for absurd, worthless things not worth taking seriously, as in 「くだらない冗談」. For boring things use 「つまらない」, for minor ones 「些細」, for the ridiculous 「馬鹿馬鹿しい」. The opposites are 「大切」 and 「貴重」.

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

1. 問題もんだいにならない。価値かちの無ない。無意義むいぎな。ばかげた。取とるに足たらない。