An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

To force or oblige (someone) to do something.

M.E. compellen, from O.Fr. compellir and directly from L. compellere "to drive together, drive to one place" (of cattle), "to force or compel" (of persons), from → com- "together" + pellere "to drive."

Vadâridan, vâdâr kardan, from vâdâr present stem of vâdâštan "to keep back, restrain, oblige; to provoke, impel, instigate; to hide, conceal," from vâ-, → de-, + dâr-, dâštan "to hold, have, possess," → possession.

1) Tending to compel, as to force or push toward a course of action; overpowering.
2) Having a powerful and irresistible effect; requiring acute admiration, attention, or respect (Dictionary.com).

→ compel; → -ing.