予防・預防|よぼうyobou[0]heiban (flat)

JLPT N3approx.Common
Which spelling to use
予防予防 is the most common form and the natural choice for learners; use it when writing the word.
預防預防 is a rarely used written variant and is less common than 予防; learners should generally avoid choosing it when writing.
Definitions
  1. noun, suru verb, transitive verbprevention; protection (against); precaution
    治療ちりょうよりも予防よぼう。↗
    Prevention is better than cure.
Conjugation
Dictionary form予防する(よぼうする)
Polite (masu)予防します(よぼうします)
Negative (nai)予防しない(よぼうしない)
polite (masen)予防しません(よぼうしません)
classical zu / nu予防せず・予防せぬ(よぼうせず・よぼうせぬ)
Past (ta)予防した(よぼうした)
polite (mashita)予防しました(よぼうしました)
Past negative (nakatta)予防しなかった(よぼうしなかった)
polite (masen deshita)予防しませんでした(よぼうしませんでした)
Te form予防して(よぼうして)
Potential予防できる(よぼうできる)
Passive予防される(よぼうされる)
Causative予防させる(よぼうさせる)
Causative passive予防させられる(よぼうさせられる)
Conditional (ba)予防すれば(よぼうすれば)
tara予防したら(よぼうしたら)
Volitional予防しよう(よぼうしよう)
polite (mashou)予防しましょう(よぼうしましょう)
Imperative予防しろ(よぼうしろ)

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

Synonyms & antonyms
  • Synonym防止ぼうしNeutralPreventing something bad from happening, as in 「事故防止」「感染防止」; close in meaning to 「予防」, which puts more emphasis on acting beforehand.
  • Related阻止そしNeutralStopping something that is happening or about to happen, as in 「侵入を阻止する」; the emphasis is on blocking it, while 「予防」 is about guarding against it in advance.

Use 「予防」 for guarding against illness, disasters and the like in advance; 「防止」 for preventing accidents, infections and the like — the two are often interchangeable. Use 「阻止」 for stopping something on the spot.

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

Japanese definitions
  1. 前まえもって防ふせぐこと。
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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