com·pel 
(kəm-pĕl)
(kəm-pĕl)tr.v. com·pelled, com·pel·ling, com·pels
1. To force (a person) to do something; drive or constrain: The court compelled the company to pay full restitution. My conscience compels me to speak out. See Synonyms at force.
2. To necessitate or require, as by force of circumstance; demand: Growing riots compelled the evacuation of the embassy.
3. To exert a strong, irresistible force on; sway: "The land, in a certain, very real way, compels the minds of the people" (Barry Lopez).
[Middle English compellen, from Latin compellere : com-, com- + pellere, to drive; see pel-5 in the Appendix of Indo-European roots.]
com·pella·ble adj.
com·pella·bly adv.
com·peller n.