事変|じへんjihen[1]atamadaka (head-high)

1. nounaccident; disaster; incident; uprising; emergency

• Synonym異変いへんNeutralAn abnormal change or strange occurrence, as in 「体に異変」; the emphasis is on something being out of the ordinary.
• Related事故じこNeutralCovers unexpected mishaps — injuries, property damage, equipment failure — as in 「交通事故」; 事変 stresses an extraordinary emergency or undeclared armed conflict.
• Related急変きゅうへんNeutralA sudden change in illness, weather, attitude or the situation, not necessarily for the worse; also a sudden emergency. 事変 is an extraordinary event or undeclared war.
• RelatedアクシデントNeutralLoanword for an unexpected accident or mishap, minor or serious; 事変 stresses an extraordinary emergency or undeclared armed conflict.
• Related波乱はらんNeutralTurbulence and ups and downs, as in 「波乱万丈」; the emphasis is on twists and turns.
• Related騒動そうどうNeutralA commotion or uproar, as in 「お家騒動」; the focus is on many people kicking up a fuss.
• Related暴動ぼうどうNeutralA riot: a crowd rising up and disrupting public order; the emphasis is on violence.
• Related騒乱そうらんWrittenWritten/formal term for society thrown into disorder; also a legal term, as in 「騒乱罪」. 事変 stresses an extraordinary emergency or undeclared war.
• Related動乱どうらんNeutralWar and social upheaval on a large scale, as in 「動乱の時代」.
• Related混乱こんらんNeutralConfusion or disorder; the most widely applicable of these words, and not necessarily a major event.
• Related騒ぎさわぎCasualColloquial for a commotion, or an incident that takes effort to deal with; 事変 is a written-style word for an extraordinary event.
• Related大騒ぎおおさわぎCasualColloquial for a big uproar or major fuss, often with a touch of exaggeration.
• RelatedもしものことCasualColloquial euphemism for an unforeseen emergency, most often serious illness or death.
• Related変事へんじWrittenA written word for an extraordinary turn of events; comparatively rare.
• Related乱らんNeutralRebellion or war, mostly as the name of a historical event, as in 「応仁の乱」.

Use 「事変」 for an extraordinary event or armed conflict launched without a declaration of war; it often serves as the name of a historical event, as in 「満州事変」. For an accidental mishap say 「事故」, for a riot 「暴動」, and for large-scale war and upheaval 「動乱」.

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

1. 非常ひじょうの出来事できごと。
2. 宣戦せんせん布告ふこくなしで行おこなわれる戦闘せんとう行為こうい。