1275-1325; (noun) Middle Englishdecre < Anglo-Frenchdecre, decret < Latindēcrētum, noun use of neuter of dēcrētus, past participle of dēcernere; see decern; (v.) Middle Englishdecreen, derivative of the noun
predecree, verb (used with object), predecreed, predecreeing.
early 14c., from Old French decre, variant of decret (12c., Modern French décret), from Latin decretum, neuter of decretus, past participle of decernere "to decree, decide, pronounce a decision," from de- (see de-) + cernere "to separate" (see crisis).
late 14c., from decree (n.). Related: Decreed; decreeing.