D defs.my
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. 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.