儚い

(1) 結果も効果も生じないさま(producing no result or effect; "a futile effort"; "the therapy was ineffectual"; "an otiose undertaking"; "an unavailing attempt")(producing no result or effect)

⇒無駄な試み(producing no result or effect)

(2) 非生産的な成功(unproductive of success; "a fruitless search"; "futile years after her artistic peak"; "a sleeveless errand"; "a vain attempt")(unproductive of success)

⇒無駄な試み(unproductive of success)

(3) 著しく短い時間続く(lasting for a markedly brief time; "a fleeting glance"; "fugitive hours"; "rapid momentaneous association of things that meet and pass"; "a momentary glimpse")(lasting for a markedly brief time)

⇒瞬間的な一瞥(lasting for a markedly brief time)

(4) 有効利用がない、あるいは役立つ機能をすることにおいて無能である(having no beneficial use or incapable of functioning usefully; "a kitchen full of useless gadgets"; "she is useless in an emergency")(having no beneficial use or incapable of functioning usefully)

⇒彼女は、緊急時には役に立たない(having no beneficial use or incapable of functioning usefully)

(5) 非常に劣った品質または状態の(of very poor quality or condition; "deplorable housing conditions in the inner city"; "woeful treatment of the accused"; "woeful errors of judgment")(of very poor quality or condition)

⇒判断の悲惨な間違え(of very poor quality or condition)

(6) 非常に短期に続く(lasting a very short time; "the ephemeral joys of childhood"; "a passing fancy"; "youth's transient beauty"; "love is transitory but it is eternal"; "fugacious blossoms")(lasting a very short time)

⇒はかない花(lasting a very short time)

(7) 永久的でない持続しない(not permanent; not lasting; "politics is an impermanent factor of life"- James Thurber; "impermanent palm cottages"; "a temperary arrangement"; "temporary housing")(not permanent)(not lasting)

⇒一時的な住宅(not lasting)