An Etymological Dictionary of Astronomy and Astrophysics

1. To act to the pleasure or satisfaction of.
   

2. To be the pleasure or will of (Dictionary.com).

Etymology (EN): From M.E. plesen, plaisen, from O.Fr. plaisir “to please, give pleasure to, satisfy,” from L. placere “to be acceptable, be liked, be approved,” related to placare “to soothe, quiet.”

Etymology (PE): Âzušidan, from prefix â- + zušé, → pleasure, + infinitive suffix -idan.