PREPENSELY
Etymology
Adverb
prepensely (comparative more prepensely, superlative most prepensely)
In a premeditated manner.
Source: Wiktionary
Pre*pense"ly, adv.
Definition: In a premeditated manner.
PREPENSE
Pre*pense", v. t. Etym: [Pref. pre + F. penser to think. See Pansy.]
Definition: To weigh or consider beforehand; to premeditate. [Obs.]
Spenser. Sir T. Elyot.
Pre*pense", v. i.
Definition: To deliberate beforehand. [Obs.]
Pre*pense", a. Etym: [See Pansy, and cf. Prepense, v. t.]
Definition: Devised, contrived, or planned beforehand; preconceived;
premeditated; aforethought; -- usually placed after the word it
qualifies; as, malice prepense.
This has not arisen from any misrepresentation or error prepense.
Southey.
Source: Webster’s Unabridged Dictionary 1913 Edition