警告|けいこくkeikoku[0]heiban (flat)

1. noun, suru verb, transitive verbwarning; caution; admonition
   彼かれは私の警告けいこくに全まったく注意ちゅういを払はらわなかった。↗

   He paid no attention to my warning.
2. noun, martial artskeikoku (penalty in judo)

• Synonym戒めるいましめるWrittenA verb: to admonish someone so they won't err, or to discipline oneself (「自らを戒める」). Leans toward written prose rather than everyday speech.
• Synonym注意ちゅういNeutralA reminder to be careful or pay attention (「注意を促す」). Milder than 「警告」 and the most common word in daily use.
• Synonym戒めいましめWrittenA noun for admonition, a lesson, or a precept (「失敗を戒めとする」); carries an educational tone.
• Synonym戒告かいこくFormalFormal: an admonition, and also an official disciplinary warning (「戒告処分」), used mainly for civil servants and in legal contexts.
• Synonym訓戒くんかいFormalFormal: instructive admonition, usually handed down from a superior to a subordinate (「訓戒を与える」); 「警告」 can go in any direction regardless of rank.
• Synonym忠告ちゅうこくNeutralSincere, well-meaning advice to someone (「友人の忠告」); 「警告」 sounds harsher and more stern.
• Synonym警報けいほうNeutralAn alert for disasters or security threats (「大雨警報」「火災警報」), usually issued by an agency or a device.
• Synonym訓告くんこくFormalFormal: a disciplinary measure heavier than 「注意」 but lighter than 「戒告」, used mainly for civil servants.
• Synonym諌めるいさめるWrittenWritten prose: to point out someone's faults and urge correction, mostly toward a superior but also peers; 「警告」 is about warning of danger in advance.
• Synonym諫めいさめWrittenA noun for remonstrance or urging someone to change, mostly directed upward; in everyday speech say 「忠告」.
• Synonym諫言かんげんWrittenWritten prose: a remonstrance from a subordinate to a superior, as in 「社長に諫言する」; 「警告」 pays no heed to rank.
• Synonym戒かいWrittenMostly Buddhist precepts (「戒を守る」); rarely stands alone and is not used for issuing warnings.
• Related警戒けいかいNeutralVigilance and guarding against danger (「警戒を強める」); the emphasis is on protecting yourself, while 「警告」 is directed outward at others.
• Related諭すさとすWrittenTo reason with someone and make them understand (「子供を諭す」), usually a superior to an inferior, in a gentle tone.
• Related言い聞かせるいいきかせるNeutralTo keep telling someone something until it sinks in (「子に言い聞かせる」); patient teaching rather than a stern warning.
• Related忠言ちゅうげんWrittenWritten prose: earnest, sincere advice (「忠言耳に逆らう」); 「警告」 lacks this nuance of heartfelt counsel.
• Related戒飭かいちょくWrittenA rare written word for admonishing someone to behave with care; in daily speech use 「戒める」.
• Related切諌せっかんWrittenA rare written word for earnest, direct remonstrance; not used in daily life — just say 「強く忠告する」.
• Related警世けいせいWrittenWritten prose: a warning aimed at society at large (「警世の書」), not at an individual.
• Related警醒けいせいWrittenWritten prose: to rouse people from complacency; rare in daily use — say 「警告」 or 「注意を促す」 instead.
• Antonym黙認もくにんWrittenTacit approval — turning a blind eye and letting things pass; the opposite of 「警告」, which calls problems out.

Use 「警告」 for an advance warning meant to keep something bad from happening; it can come from a person or be displayed by a device or sign (「警告を受ける」「警告表示」). For a general reminder pick 「注意」, for well-meant advice 「忠告」, and for disaster or security alerts 「警報」. 「戒告」 and 「訓告」 are official disciplinary measures, 「訓戒」 is formal admonition from a superior, and written words like 「諌める」「諫言」「忠言」 are for admonishing or advising; 「黙認」, turning a blind eye, is the opposite.

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

1. 好このましくない事態じたいにならないよう、事前じぜんに注意ちゅういを与あたえること。アラート。