Imbitter
Pronunciation : Im*bit"ter
Part of Speech : v.
Etymology : [Pref. im- in + bitter. Cf. Embitter.] [Written also embitter.]
Definition : Defn: 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.
t. [imp. & p. p. Imbittered; p. pr. & vb. n. Imbittering.]
Source : Webster's Unabridged Dictionary, 1913