防止|ぼうしboushi[0]heiban (flat)

1. noun, noun (suffix), suru verb, transitive verbprevention; check
   チョコレートにはＬＤＬの酸化さんかを防止ぼうしする力ちからがある。↗

   Chocolate acts to prevent LDL oxidisation.

• Synonym阻止そしNeutralBlocks a concrete action from happening or being realized, as in 「侵入を阻止する」「法案の成立を阻止する」; 「防止」 is about taking measures so bad things never occur.
• Synonym予防よぼうNeutralAdvance precautions, used mostly for illness and disasters, as in 「風邪の予防」; 「防止」 is more common for accidents and crime.
• SynonymストップNeutralLoanword for stopping or calling a halt; colloquial, and it focuses on bringing something already in progress to a stop.
• Related阻害そがいWrittenWritten/formal: obstructing development, as in 「成長を阻害する」; negative nuance of getting in the way, while 「防止」 is about keeping bad things from happening.
• Related食い止めるくいとめるNeutralContaining something bad from spreading, as in 「被害を食い止める」; the focus is on holding it back mid-spread.
• Related止めるとめるNeutralEveryday verb for stopping or checking something, with the broadest range of use; 「防止」 is more written/formal and noun-like.
• Related阻むはばむWrittenA written/formal word for blocking someone's way or obstructing their plans, as in 「行く手を阻む」; literary in flavor.
• Related邪魔じゃまNeutralColloquial for getting in the way or being a nuisance, with a nuance of disturbance; 「防止」 is deliberate prevention of bad things.
• Related封じるふうじるWrittenWritten/formal: sealing off or blocking movement or action, as in 「動きを封じる」; stresses suppressing it completely.
• Related防ぐふせぐNeutralThe everyday verb for preventing or guarding against something, as in 「事故を防ぐ」; mostly interchangeable with 「防止する」 and more colloquial.
• Related妨げるさまたげるWrittenWritten/formal: hindering something from proceeding, as in 「睡眠を妨げる」; has a negative, obstructive effect.
• Related禁止きんしNeutralFormally forbidding an act, as in 「立ち入り禁止」; stresses the rule or ban itself, while 「防止」 stresses the measures taken.
• Related停止ていしNeutralStopping operation or suspending activity, as in 「営業停止」; the focus is on coming to a halt.
• Related中止ちゅうしNeutralCalling something off, whether partway through or before it starts, as in 「試合中止」; the focus is on it not going ahead.
• Related打ち切るうちきるNeutralEnding or terminating something midway, as in 「交渉を打ち切る」; unrelated to guarding against bad things.
• Related禁じるきんじるWrittenA written/formal verb for forbidding, as in 「喫煙を禁じる」; stresses issuing an order not to do something.
• Related禁断きんだんWrittenWritten/formal: strict prohibition, as in 「禁断の果実」 with a tinge of temptation; 「禁断症状」 means withdrawal symptoms.
• Related留めるとどめるNeutralAs 「止める」 it also covers stopping bleeding or shutting off a machine, while parking is usually written 「停める」; the focus is on the stopping action itself.
• Related押しとどめるおしとどめるWrittenA written/formal word for holding someone back or talking them out of an action, as in 「出て行くのを押しとどめる」; usually aimed at people.
• Related差し止めるさしとめるWrittenWritten/formal: ordering a halt or ban, as in 「出版を差し止める」; typically an official act.
• Related取りやめるとりやめるNeutralCancelling a plan that was already set, as in 「行事を取りやめる」; unrelated to guarding against bad things.
• Related防遏ぼうあつWrittenWritten/formal: prevention and suppression; rare in modern Japanese — say 「防止」 in everyday contexts.
• Antonym促進そくしんNeutralAntonym: promoting or accelerating development — the opposite direction from 「防止」, which blocks bad things.
• Antonym助長じょちょうWrittenWritten/formal antonym: fostering an undesirable tendency, as in 「差別を助長する」 — the direct opposite of 「防止」.

Use 「防止」 for taking measures in advance so something bad doesn't happen; the verb is 「防ぐ」. For illness use 「予防」, for blocking an action 「阻止」, for containing something as it spreads 「食い止める」, and for an outright ban 「禁止」. 「止める」「ストップ」「停止」 halt things already under way, 「邪魔」「妨げる」「阻害」 get in the way, and 「中止」「取りやめる」「打ち切る」 call off or cut short events and plans rather than prevent harm.

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

1. 防ふせぎ、止とめる事こと。