IPA: /ɪmˈbɪtə/
KK: /ɪmˈbɪtər/
To make someone feel bitter or resentful, often due to negative experiences or feelings.
The unfair treatment at work began to imbitter him against his colleagues.
Past: imbittered
Past Participle: imbittered
Imbitter → It is formed from "in-" (meaning into or upon) and "bitter" (from Old English "biter", meaning having a sharp taste or unpleasant flavor). The word "imbitter" means to make something bitter or to cause bitterness to be felt.
Think of something that makes a situation 'bitter' ('bitter') and how it can 'affect' ('in-') the feelings involved.