Simple past tense and past participle of war.(verb)
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Use "warred" in a sentence
"The government/state/political entity with which we warred is dead."
"Norrey's tears stopped as if they had been shut off, and her expression warred between doubt and hope."
"As they got closer, they could see that Ronon's expression warred between pleased and nonplussed, and the younger woman was staring up at him with a mysterious smile on her face."