乱用・濫用|らんようran'you[0]heiban (flat)

JLPT N1approx.Common
Which spelling to use
乱用乱用 is the most common form and the recommended default for learners; it is written entirely in kanji and is the form to use when writing this word.
濫用濫用 is a less common kanji-only variant of 乱用. Recognize it when encountered, but learners should choose 乱用 instead.
Definitions
  1. noun, suru verb, transitive verbabuse; misuse; misappropriation; using to excess
    彼かれは特権とっけんを乱用らんようしたに違ちがいない。↗
    He must have abused the privilege.
Conjugation
Dictionary form乱用する(らんようする)
Polite (masu)乱用します(らんようします)
Negative (nai)乱用しない(らんようしない)
polite (masen)乱用しません(らんようしません)
classical zu / nu乱用せず・乱用せぬ(らんようせず・らんようせぬ)
Past (ta)乱用した(らんようした)
polite (mashita)乱用しました(らんようしました)
Past negative (nakatta)乱用しなかった(らんようしなかった)
polite (masen deshita)乱用しませんでした(らんようしませんでした)
Te form乱用して(らんようして)
Potential乱用できる(らんようできる)
Passive乱用される(らんようされる)
Causative乱用させる(らんようさせる)
Causative passive乱用させられる(らんようさせられる)
Conditional (ba)乱用すれば(らんようすれば)
tara乱用したら(らんようしたら)
Volitional乱用しよう(らんようしよう)
polite (mashou)乱用しましょう(らんようしましょう)
Imperative乱用しろ(らんようしろ)

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

Synonyms & antonyms
  • Synonym悪用あくようNeutralUsing something for a bad purpose, as in 「個人情報の悪用」; it stresses deliberate wrongdoing, while 「乱用」 stresses lack of restraint.
  • Synonym妄用ぼうようWrittenWritten word for using something recklessly; rare in modern Japanese — in everyday speech 「乱用」 is the normal choice.
  • Related誤用ごようNeutralUsing something incorrectly, as in 「言葉の誤用」; the mistake is usually unintentional, unlike the excess implied by 「乱用」.
  • Antonym節用せつようWrittenWritten word for using things sparingly, i.e. economizing; it stands at the opposite pole from the unrestrained 「乱用」.
  • Antonym適正使用FormalFormal term for correct, moderate use; the direct opposite of 「乱用」, as in 「適正使用」 of medicines.

Use 「乱用」 for unrestrained overuse, as in 「職権乱用」 or 「薬物乱用」. Choose 「悪用」 for deliberate malicious use and 「誤用」 for using something wrongly by mistake; 「適正使用」 is its formal opposite. 「妄用」 and 「節用」 are written, rare words.

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

Japanese definitions
  1. 限度げんどを弁わきまえず、濫みだりに用もちいること。
  2. 限度げんどを弁わきまえず、濫みだりに用もちいる。
Kanji in this word
English equivalents

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

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