To place in danger or to expose to risk; an archaic or rare past tense form suggesting causing danger.
From 'danger' (a noun derived from Old French 'dangier,' meaning power or authority) used as a verb with '-ed' past tense, though this usage is extremely rare in modern English.
This word is so archaic it barely exists in modern usage—it shows how English verbs can technically be created from nouns, but 'endanger' won out as the preferred form, making 'dangered' a linguistic road not taken.
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