useless matter; futile act; waste of effort
Refers to something pointless, a wasted action, or idle thoughts. Often used in expressions like 無駄事を言う (to say something useless) or 無駄事をする (to do something futile).
There's no time to waste on such useless things.
He's always saying pointless things.
Standard kanji spelling.
Mixed kanji-kana spelling; easier to read for learners.
Compound of 無駄 (むだ, 'useless') and 事 (こと, 'thing, matter'). The reading ごと is a rendaku form of こと.