generated at
war

noun
a state of armed conflict between different nations or states or different groups within a nation or state:
〖具体例では可算〗 «…との/…の間の» 戦争, 戦争状態; 戦時(↔ peace; → battle) «with, on, against/between»
e.g. Japan declared war on Germany
e.g. the two countries had been at war for six years.
a particular armed conflict:
e.g. after the war, they immigrated to America.
(権力・支配・勢力などをめぐる)争い, 戦争 (!通例修飾語を伴って)
e.g. she was at war with her parents
e.g. a price war among discount retailers.
«…に対する» (長期にわたる組織的な)闘い, 争い «on, against»
e.g. the authorities are waging war against all forms of smuggling
e.g. a war on drugs.

verb (wars, warring, warred) no object
engage in a war:
⦅文⦆ «…と/…のため» 戦争する, 戦う «with, against/for» .
e.g. small states warred against each other
【病気などと】激しく闘う «against, on» .
e.g. figurative : conflicting emotions warred within her.

PHRASES
declare, begin, or see active service in a war:
e.g. of the four brothers who went to war, only Thomas survived.

archaic serve as a soldier:
e.g. I did all I could to dissuade him from going to the wars.

|ˈwôr ˌkloudz| a threatening situation of instability in international relations:
e.g. the war clouds were looming.

a prolonged war or period of conflict during which each side seeks to gradually wear out the other by a series of small-scale actions.

a prolonged debate conducted by means of the spoken or printed word:
e.g. the political war of words over tax.

a war, especially World War I, regarded as making subsequent wars unnecessary.

ORIGIN
late Old English werre, from an Anglo-Norman French variant of Old French guerre, from a Germanic base shared by worse.