CONTEMPER
Etymology
Verb
contemper (third-person singular simple present contempers, present participle contempering, simple past and past participle contempered)
(obsolete, transitive) To modify or temper; to allay; to qualify; to moderate or soften.
Source: Wiktionary
Con*tem"per, v. t. Etym: [L. contemperare, -temperatum; con- +
temperare to temper. Cf. Contemperate.]
Definition: To modify or temper; to allay; to qualify; to moderate; to
soften. [Obs.]
The antidotes . . . have allayed its bitterness and contempered its
malignancy. Johnson.
Source: Webster’s Unabridged Dictionary 1913 Edition