Archaic or poetic past tense and past participle of 'drop'; an alternative form to the more common 'dropped.'
From 'drop' (Old English 'dropa') with the archaic weak past tense suffix '-t,' which was common in older English before '-ed' became standard.
You'll find 'dropt' in poetry and older texts because it's one syllable instead of 'dropped's two, making it perfect for verse—Shakespeare and his contemporaries used it for both metrical and stylistic reasons.
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