Emily Dickinson Lexicon

AC'RI-MO-NY, n. [L. acrimonia, from acer, sharp. The latter part of the word seems to denote likeness, state, condition, like head, hood, in knighthood; in which case it may be from the same root as maneo, Gr. μενω.]

1. Sharpness; a quality of bodies, which corrodes, dissolves, or destroys others, as, the acrimony of the humors. – Bacon.
2. Figuratively, sharpness or severity of temper; bitterness of expression proceeding from anger, ill-nature, or petulance. – South.