oblige

verb

Etymology: From Middle English obligen, from Old French obligier, obliger, from Latin obligō, obligāre, from ob- + ligō. Doublet of obligate, taken straight from Latin.

1. To constrain someone by force or by social, moral or legal means.

   “Your carelessness obliges firmness on my part.”

   “I am obliged to report to the police station every week.”

2. To do (someone) a service or favour (hence, originally, creating an obligation).

   “He obliged me by not parking his car in the drive.”

   “The singer obliged(us) with an encore.”

3. To cause somebody to feel indebted.

   “I am much obliged to you for your recent help.”