Etymology
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controversy (n.)

"disputation, debate, prolonged agitation of contrary opinions," late 14c., from Old French controversie "quarrel, disagreement" or directly from Latin controversia "a turning against; contention, quarrel, dispute," from controversus "turned in an opposite direction, disputed, turned against," from contra "against" (see contra (prep., adv.)) + versus "turned toward or against," past participle of vertere "to turn" (from PIE root *wer- (2) "to turn, bend").

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Definitions of controversy

controversy (n.)
a contentious speech act; a dispute where there is strong disagreement;
Synonyms: contention / contestation / disputation / disceptation / tilt / argument / arguing
From wordnet.princeton.edu