oblige
     v 1: force or compel somebody to do something; "We compel all
          students to fill out this form" [syn: {compel}, {obligate}]
     2: bind by an obligation; cause to be indebted; "He's held by a
        contract"; "I'll hold you by your promise" [syn: {bind}, {hold},
         {obligate}]
     3: provide a service or favor for someone; "We had to oblige
        him" [syn: {accommodate}] [ant: {disoblige}]
Source: WordNet® 2.0