Emily Dickinson Lexicon

WEAK'EN, v.t. [week'n; Sax. wacan, to languish, to vacillate.]

1. To lessen the strength of, or to deprive of strength; to debilitate; to enfeeble; as, to weaken the body; to weaken the mind; to weaken the hands of the magistrate; to weaken: the force of an objection or an argument.
2. To reduce in strength or spirit; as, to weaken tea; to, weaken any solution or decoction.