Past tense or archaic form of 'fright,' meaning to frighten or cause fear in someone.
From Middle English 'fright,' from Old English 'fyrhto,' related to 'fear'; the -ed ending marks past tense, though modern English typically uses 'frightened' instead.
This is an older form of the word you see in historical texts and poetry—you might find 'frighted' in Shakespeare, but nowadays we say 'frightened' instead.
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