IMBITTERS
Verb
imbitters
Third-person singular simple present indicative form of imbitter
Source: Wiktionary
IMBITTER
Im*bit"ter, v. t. [imp. & p. p. Imbittered; p. pr. & vb. n.
Imbittering.] Etym: [Pref. im- in + bitter. Cf. Embitter.] [Written
also embitter.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition