Archaic past tense of 'drein' or 'drain'; to empty or draw off liquid.
From Middle English 'drein' or 'drain,' from Old English 'drænian.' 'Dreint' is an archaic past-tense form.
Archaic past tenses like 'dreint' show how English used to have much more variety in verb forms—before English simplified most verbs to just add '-ed,' different verbs had their own special past-tense patterns, like how 'drink' became 'drank'.
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