1. compel, force. 2. obligate. 4. Oblige, accommodate imply making a gracious and welcome gesture of some kind. Oblige emphasizes the idea of conferring a favor or benefit (and often of taking some trouble to do it): to oblige someone with a loan. Accommodate emphasizes doing a service or furnishing a convenience: to accommodate someone with lodgings and meals.
c.1300, "to bind by oath," from O.Fr. obligier, from L. obligare, from ob "to" + ligare "to bind," from PIE base *leig- "to bind" (see ligament). Main modern meaning "to make (someone) indebted by conferring a benefit or kindness" is from 1560s.