Entry 1 sense Webster, 1913 Imbitter · Im·bit·ter · IPA /əmˈbɪtəɹ/ 01 v. t. To make bitter; hence, to make distressing or more distressing; to make sad, morose, sour, or malignant. imp. & p. p. Imbittered; p. pr. & vb. n. Imbittering 1. To make bitter; hence, to make distressing or more distressing; to make sad, morose, sour, or malignant. “Is there anything that more imbitters the enjoyment of this life than shame?” — South. “Imbittered against each other by former contests.” — Bancroft.