Acrimony is bitterness, or ill will. Acrimony is a spiteful word. It sounds bitter, like acid.
Acrimony comes from the Latin word acrimonia, meaning basically sharpness. Although it sounds like matrimony, the only thing the words have in common is the suffix from monium which means state, condition. So its the state of being acrid, or bitter. Its not just for married folks, though this slightly dusty noun can refer to any sharp, bitter feeling. After a drawn-out court case, there might be lingering acrimony stirred up during the trial. Not surprisingly, its also the name of a British heavy metal band from the 90s.*##**##*
