衰える|おとろえるotoroeru[4]nakadaka (mid-high)

JLPT N1approx.Common
Definitions
  1. ichidan verb, intransitive verbto become weak; to decline; to wear; to abate; to decay; to wither; to waste away
    私は体力たいりょくが衰おとろえた。↗
    My physical power has decayed.
Conjugation
Dictionary form衰える(おとろえる)
Polite (masu)衰えます(おとろえます)
Negative (nai)衰えない(おとろえない)
polite (masen)衰えません(おとろえません)
classical zu / nu衰えず・衰えぬ(おとろえず・おとろえぬ)
Past (ta)衰えた(おとろえた)
polite (mashita)衰えました(おとろえました)
Past negative (nakatta)衰えなかった(おとろえなかった)
polite (masen deshita)衰えませんでした(おとろえませんでした)
Te form衰えて(おとろえて)
Potential衰えられる(おとろえられる)
Passive衰えられる(おとろえられる)
Causative衰えさせる(おとろえさせる)
Causative passive衰えさせられる(おとろえさせられる)
Conditional (ba)衰えれば(おとろえれば)
tara衰えたら(おとろえたら)
Volitional衰えよう(おとろえよう)
polite (mashou)衰えましょう(おとろえましょう)
Imperative衰えろ(おとろえろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • Synonym弱まるよわまるNeutralUsed when wind, rain, momentum or intensity weakens, as in 「風が弱まる」; 「衰える」 centers on strength or power declining from its prime.
  • Synonym弱るよわるNeutralCovers being physically frail and also being troubled or at a loss; 「衰える」 focuses on strength or power declining from its peak.
  • Synonym減衰げんすいWrittenWritten/formal prose and a physics term: signals or vibrations fading away; 「衰える」 is about physical strength and power.
  • Synonym萎えるなえるNeutralCovers strength or drive draining away and plants wilting, as in 「気力が萎える」; 「衰える」 stresses decline from a former peak.
  • Synonym衰微すいびWrittenWritten/formal prose for the decline of a nation or family; 「衰える」 is more colloquial.
  • Synonym衰耗すいもうWrittenWritten/formal prose and rare: weakening and wearing away; in everyday speech say 「衰える」.
  • Related衰退すいたいNeutralA Sino-Japanese noun for the decline of power or industries, as in 「産業の衰退」; also 「衰退する」. 「衰える」 is more colloquial.
  • Related低下ていかNeutralFor ability or quality dropping, as in 「視力低下」; 「衰える」 pictures an overall decline from a peak.
  • Related減退げんたいNeutralUsed for appetite or memory fading; 「衰える」 is about overall decline.
  • Related凋落ちょうらくWrittenWritten/formal prose for prosperity fading into downfall; 「衰える」 is the broader, more general word.
  • Antonym栄えるさかえるNeutralAntonym on the rise-and-fall axis: prospering and flourishing, the opposite of 「衰える」's decline.
  • Antonym盛るさかるNeutralAntonym on the rise-and-fall axis: growing vigorous and thriving, the opposite of 「衰える」's decline.
  • Antonym隆盛するWrittenWritten/formal-prose antonym on the rise-and-fall axis: prosperity and flourishing, opposite 「衰える」.

Use 「衰える」 for strength, power or popularity fading from a peak, as in 「体力が衰える」. Pick 「弱まる」 for wind or momentum easing, 「弱る」 for frailty or being at a loss, 「低下」 for falling ability, 「萎える」 for lost drive, 「減退」 for appetite or memory, 「衰退」 for industries. 減衰, 衰微, 衰耗 and 凋落 are written/formal prose; the opposites are 「栄える」, 「盛る」 and 「隆盛する」.

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

Japanese definitions
  1. 力ちからなどが弱よわくなる。
Kanji in this word
See also

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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