Definitions

1. verb

to make (someone) feel bitter or resentful; to make (something) bitter or unpleasant

“The politician’s words embittered the crowd.”

2. noun

the state of being embittered; a bitter feeling of resentment or anger

“She struggled with the embitterment that had consumed her since the loss.”

3. adjective

causing or expressing bitter resentment or anger

“The embittered tone of the email was clear to everyone.”