How to say "prevent" in Japanese

Choosing the right word
  • 妨げるさまたげるJLPT N2approx.Common
    ichidan verb, transitive verbCovers 'prevent' in the sense of hindering or obstructing — getting in the way of something proceeding or developing smoothly, such as work, progress, or sleep; the nuance is interference rather than outright stopping.
    騒音そうおんが彼かれの睡眠すいみんを妨さまたげた。↗
    The noise disturbed his sleep.
  • 阻むはばむJLPT N1approx.Common
    godan verb, transitive verbCovers 'prevent' as actively stopping someone from doing something — blocking or checking a person's action or advance. The nuance is forceful interception, thwarting an attempt rather than taking precautions.
    彼かれらは大おおきな川かわに前進ぜんしんを阻はばまれた。↗
    Their progress was stopped by a wide river.
  • 食い止めるくいとめるCommon
    ichidan verb, transitive verbCovers 'prevent' when something undesirable is already under way and you hold it back or keep it at bay — checking a spread, an advance, or a decline before it grows worse.
    被害ひがいは最小限さいしょうげんに食い止くいとめられた。↗
    The damage was held to a minimum.
  • 防ぐふせぐJLPT N3approx.Common
    godan verb, transitive verbThe closest match for 'prevent' proper: taking measures in advance so that something undesirable — an accident, an infection, a loss — never happens. Choose this when the emphasis is on averting the event altogether.
    塩しおは魚さかなが腐くさるのを防ふせぐ。↗
    Salt preserves fish from spoilage.
  • 拒むこばむCommon
    godan verb, transitive verbIts core meaning is to refuse or reject; as 'prevent' it appears when you deny someone something or block their access — a deliberate refusal to allow, not a general preventive measure.

Choose 「防ぐ」 to stop something bad from happening through advance measures, 「妨げる」 to hinder a process, 「阻む」 to stop someone's action, 「食い止める」 to hold back something spreading or advancing, and 「拒む」 to refuse or deny someone.

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

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

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