Imbitterer n. : One who, or that which, imbitters.

Example:


Taxonomy
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Defination from the web:
embittered in the Online Dictionary. Meaning of embittered. Pronunciation of embittered. Translations of embittered. embittered synonyms, embittered antonyms. ... They were, moreover, in the present case, embittered with certain circumstances, which being mixed with ...