WoD - acrimony

ac·ri·mo·ny   /ˈækrəˌmoʊni/ Show Spelled[ak-ruh-moh-nee]

–noun
sharpness, harshness, or bitterness of nature, speech, disposition, etc.: The speaker attacked him with great acrimony.

Origin:
1535–45; < L ācrimōnia, equiv. to ācri- (s. of ācer ) sharp, sour + -mōnia -mony