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
COMMON COMPOUNDS:
- 無駄遣い: wasteful spending
- 無駄話: idle chatter
- 無駄足: a wasted trip
- 無駄死に: dying in vain
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).