the GNU version of the Collaborative International Dictionary of English
v. To make bitter or sad. See imbitter.
The Century Dictionary and Cyclopedia
To make bitter or more bitter.
To affect with biterness or unhappiness; make distressful or grievous: as, the sins of youth often embitter old age.
To render more violent or malignant; exasperate.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. cause to be bitter or resentful
Word Usage
"These fraudulent dealings of the heart are those impostures which plunge men into infinite calamities and inconveniences, such as embitter the enjoyment even of common life itself."