無駄遣い・徒遣い・無駄使い|むだづかいmudazukai[3]nakadaka (mid-high)

JLPT N1approx.Common
Which spelling to use
無駄遣い無駄遣い is the most common form and uses a mixture of kanji and kana. It is the form beginners should use.
徒遣い徒遣い uses a mixture of kanji and kana but is rarely used, so learners will seldom encounter it.
無駄使い無駄使い is less common than 無駄遣い and uses an irregular kanji spelling. It may appear as a less common written variant.
Definitions
  1. noun, suru verb, transitive verbwaste (of money, time, etc.); squandering; frittering away
    なんてひどいむだ使づかいでしょう。↗
    What a fearful waste of money!
Conjugation
Dictionary form無駄遣いする(むだづかいする)
Polite (masu)無駄遣いします(むだづかいします)
Negative (nai)無駄遣いしない(むだづかいしない)
polite (masen)無駄遣いしません(むだづかいしません)
classical zu / nu無駄遣いせず・無駄遣いせぬ(むだづかいせず・むだづかいせぬ)
Past (ta)無駄遣いした(むだづかいした)
polite (mashita)無駄遣いしました(むだづかいしました)
Past negative (nakatta)無駄遣いしなかった(むだづかいしなかった)
polite (masen deshita)無駄遣いしませんでした(むだづかいしませんでした)
Te form無駄遣いして(むだづかいして)
Potential無駄遣いできる(むだづかいできる)
Passive無駄遣いされる(むだづかいされる)
Causative無駄遣いさせる(むだづかいさせる)
Causative passive無駄遣いさせられる(むだづかいさせられる)
Conditional (ba)無駄遣いすれば(むだづかいすれば)
tara無駄遣いしたら(むだづかいしたら)
Volitional無駄遣いしよう(むだづかいしよう)
polite (mashou)無駄遣いしましょう(むだづかいしましょう)
Imperative無駄遣いしろ(むだづかいしろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • Synonym浪費ろうひNeutralRather formal word for wasting money, time or resources, as in 「時間の浪費」; broader in range than 「無駄遣い」.
  • Synonym空費くうひWrittenWritten word for wasting time or money to no avail; less common than 「無駄遣い」.
  • Synonym乱費らんぴWrittenWritten word for spending money recklessly and without restraint; heavier in tone than 「無駄遣い」, with stress on misuse of funds.
  • Synonym徒費とひWrittenWritten word for futile, pointless spending; rare today — in everyday speech say 「無駄遣い」 or 「浪費」.
  • Synonym蕩尽とうじんWrittenWritten word for squandering the family fortune entirely, as in 「財産を蕩尽する」; far more extreme than 「無駄遣い」.
  • Related不経済ふけいざいNeutralRefers to being uneconomical or poor value; stresses inefficiency and does not necessarily mean wasting money.
  • Related無駄むだNeutralThe broadest term here, covering uselessness and futility of any kind; it names the waste itself rather than the act of spending money or resources on it.
  • Related冗費じょうひWrittenWritten word for unnecessary, useless expenditure, as in 「冗費削減」; found in accounting and administrative contexts.
  • Antonym節約せつやくNeutralAntonym: saving on expenses, as in 「電気を節約する」; the direct opposite of 「無駄遣い」.
  • Antonym倹約けんやくNeutralAntonym meaning thrift and frugality; stresses economy as a daily habit, standing against waste.

Use 「無駄遣い」 for spending money or resources on useless things, as in 「お金の無駄遣い」. 「浪費」 is the more formal word for waste; 「乱費」 and 「蕩尽」 stress unrestrained squandering, 「蕩尽」 most extreme. 「不経済」 stresses inefficiency, not necessarily wasted money; 「無駄」 covers futility of any kind. 「空費」 and 「徒費」 are uncommon written words; 「冗費」 is accounting/administrative. To save, use 「節約」 or 「倹約」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. (金銭きんせんを)無駄むだにつかうこと。浪費ろうひ。
Kanji in this word
English equivalents
See also

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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