Why is the ninth month called September?
1540s, from Middle French rapacité (16c.), from Latin rapacitatem (nominative rapacitas) "greediness," from rapax (genitive rapacis) "grasping, plundering," from rapere "seize" (see rapid).
1650s, from Latin rapaci-, stem of rapax "grasping," itself from stem of rapere "to seize" (see rapacity) + -ous. Related: Rapaciously; rapaciousness.