Third-person singular present tense of 'disregard' (to ignore or fail to consider) or plural noun (instances of ignoring or matters that are overlooked).
From dis- (negation) + regard (Old French 'regarder', meaning to look at or consider). The base word entered English in the 1600s from Romance language sources.
One fascinating use: 'he disregards her warnings' versus 'his disregards for safety'—the same root word becomes either a powerful verb describing active negligence or an abstract plural noun for collective violations.
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