氾濫・はん濫・汎濫|はんらんhanran[0]heiban (flat)

JLPT N1approx.Common
Which spelling to use
氾濫氾濫 is the most common and most standard spelling, written entirely in kanji; it is the form beginners should use.
はん濫はん濫 is a less common mixed kanji-and-kana spelling of 氾濫, so learners may encounter it as a variant.
汎濫汎濫 is a rarely used all-kanji spelling of 氾濫; learners may encounter it, but it should not be their default choice.
Definitions
  1. noun, suru verb, intransitive verboverflowing; flood; inundation; deluge
    川かわが氾濫はんらんして広ひろい地域ちいきが水浸みずびたしになった。↗
    The river flooded a large area.
  2. noun, suru verb, intransitive verboversupply; plethora; abundance (esp. of something undesirable)
Conjugation
Dictionary form氾濫する(はんらんする)
Polite (masu)氾濫します(はんらんします)
Negative (nai)氾濫しない(はんらんしない)
polite (masen)氾濫しません(はんらんしません)
classical zu / nu氾濫せず・氾濫せぬ(はんらんせず・はんらんせぬ)
Past (ta)氾濫した(はんらんした)
polite (mashita)氾濫しました(はんらんしました)
Past negative (nakatta)氾濫しなかった(はんらんしなかった)
polite (masen deshita)氾濫しませんでした(はんらんしませんでした)
Te form氾濫して(はんらんして)
Potential氾濫できる(はんらんできる)
Passive氾濫される(はんらんされる)
Causative氾濫させる(はんらんさせる)
Causative passive氾濫させられる(はんらんさせられる)
Conditional (ba)氾濫すれば(はんらんすれば)
tara氾濫したら(はんらんしたら)
Volitional氾濫しよう(はんらんしよう)
polite (mashou)氾濫しましょう(はんらんしましょう)
Imperative氾濫しろ(はんらんしろ)

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

Synonyms & antonyms
  • Synonym洪水こうずいNeutralNames the flood or flood disaster itself. 「氾濫」 centres on a river overflowing its banks and is also used figuratively for information or shoddy goods running rampant.
  • Synonym出水しゅっすいWrittenWritten term for a river rising and flooding; close to 「氾濫」, which can also be used figuratively for information and the like running rampant.
  • Synonym大水おおみずCasualColloquial word for a big flood. 「氾濫」 focuses on water spilling out of the river channel and can also be used figuratively.
  • Related溢れ出すあふれだすNeutralSays something begins to well up and spill out. 「氾濫」 centres on a river flooding and wreaking havoc.
  • Related溢れ出るあふれでるNeutralSays something flows out because its container is full. 「氾濫」 centres on a river bursting its banks.
  • Related越流えつりゅうWrittenWritten, engineering-flavoured term for water spilling over a dam or embankment; 「氾濫」 is far broader.
  • Antonym干上がるひあがるNeutralSays a pond or lake dries up and loses its water — the opposite of 「氾濫」 in its flooding sense.
  • Antonym渇水かっすいWrittenWritten term for a water shortage caused by scarce rainfall — the opposite of 「氾濫」 as flood disaster.

Use 「氾濫」 for a river overflowing its banks or, figuratively, for information or goods flooding society, as in 「川が氾濫する」「情報の氾濫」. For the flood itself say 「洪水」; colloquially 「大水」; for overflowing 「溢れる」; for drying up 「干上がる」; for water shortage 「渇水」.

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

Japanese definitions
  1. 河川かせんなどが増水ぞうすいし、その水みずが溢あふれ広ひろがること。
  2. ある物事ものごとが社会しゃかい一般いっぱんに大量たいりょうに出回でまわっていること。
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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