むだ無駄mudaむだmuda
1.

A situation where efforts yield no significant results or benefits, rendering the actions ineffective or unproductive.

2.

An act or behavior that does not serve a useful purpose, resulting in wasted time, resources, or energy.

3.

The feeling or realization that something done is ultimately in vain, lacking any meaningful outcome or success.

4.

A characteristic of an action or expenditure that fails to provide any necessary value or practicality, often leading to unnecessary excess.

Example:

今更後悔しても無駄だ。

むだづか無駄遣mudazukaiむだづか無駄使mudazukai
1.

The act of spending resources, particularly money, on things that are unnecessary or provide little to no value, resulting in wastefulness.

2.

The practice of using financial assets excessively or in a manner that does not contribute to worthwhile outcomes, often leading to economic inefficiency.

3.

The behavior of allocating funds to items or activities that do not yield significant benefits, highlighting a lack of prudence in financial decision-making.

Example:

なんてひどいむだ使いでしょう。

むだばなし無駄話mudabanashi
1.

Casual conversation that lacks purpose or meaningful content, often enjoyed among friends during leisure time.

2.

Talking about trivial matters that do not contribute to any significant outcome or information exchange.

3.

Light-hearted discussions that serve primarily to pass the time rather than to convey important ideas or facts.

Example:

あの老人たちは街角に無駄話をしに行くのが好きだ。

むだあし無駄足mudaashiむだmudaあしashi
1.

A situation where an effort to visit or go somewhere results in no benefit or accomplishment, often leaving one feeling unproductive or frustrated.

2.

The experience of traveling to a location without achieving the intended purpose, leading to a sense of futility in the endeavor.

3.

The act of making a trip that ultimately proves fruitless or unnecessary, as the goals set out before the journey remain unmet.

むだぐち無駄口mudaguchi
1.

A conversation that serves no real purpose, often used simply to pass the time without contributing meaningful information.

2.

Unnecessary or trivial talk that does not provide any value or benefit, often considered a waste of time.

3.

Superfluous or aimless chatter that distracts from more important topics, often perceived as unproductive.