失敗 - 無益

to put effort into doing something unproductive and completely unnecessary

無駄な努力をする

to undertake something that is pointless

無駄な努力をする

to pursue a goal or aspiration that is unrealistic or unlikely to be achieved

to completely fail to produce the intended or expected effect

完全に失敗した

to fail to achieve the desired results

何の成功も得られない

used to refer to something, such as a chance, idea, etc., that has been completely wasted or neglected

無駄にした（チャンスなど）

to fail to produce or achieve the desired result

望ましい結果を達成できない

to fail to achieve success despite the attempts made

失敗したまま

with no success achieved or no progress made

実りのない、失敗した

to engage in a fruitless or pointless activity

無駄な努力をする

to waste too much money, resources, or effort on doing something that proves to be unfulfilling in the end

多額の経済的損失を被る

a pursuit or search for something that is unlikely to produce any useful result

実りのない追跡や探索

to come to realize what could have been done to prevent something bad from happening after it has already happened

不幸な出来事の後に解決策を考える

to make an attempt to achieve something that seems extremely difficult or even impossible

一見困難または不可能に見える何かを達成する

to engage in a futile or meaningless action in an attempt to resolve a problem or accomplish a task

無駄な行動

to make a fruitless attempt in order to make something look more beautiful or successful

何かをより良く見せようとする無駄な試み

to make a fruitless attempt to solve a problem

無駄な努力をする

to disagree with or continue arguing about a decision that is already made

最終決定に対する反対