1.
useless, wasteful, futile
Something that serves no purpose or achieves nothing.
無駄 describes something that serves no useful purpose or yields no result. It functions as both a na-adjective and a noun.
Common patterns
- 無駄な + noun: 無駄な時間 (wasted time), 無駄な努力 (wasted effort)
- 無駄にする: to waste (時間を無駄にする = waste time)
- 無駄になる: to go to waste, be wasted
- 無駄がない: no waste, efficient
Compounds
Usage
Often used with をする for wasteful action or になる when something turns out to be pointless: せっかくの努力が無駄になった (all that effort went to waste).
Related Words
Compare:
不必要 (unnecessary)
Compare:
有意義 (meaningful, worthwhile)
Compare:
非効率 (inefficiency)
Compare:
報われない (unrewarded)