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Related to prepense: Malice prepense
Contemplated or arranged in advance; premeditated: malice prepense.
[From Middle English, past participle of purpensen, to premeditate, from Anglo-Norman purpenser : pur-, before (from Latin pro-; see pro-1) + penser, to think (from Latin pēnsāre; see (s)pen- in Indo-European roots).]
(Law) (postpositive) (usually in legal contexts) arranged in advance; premeditated (esp in the phrase malice prepense)
[C18: from Anglo-Norman purpensé, from Old French purpenser to consider in advance, from penser to think, from Latin pēnsāre to weigh, consider]
planned or intended in advance; premeditated.