complacent
adj.
1650s, "pleasing," from Latin complacentem (nominative complacens) "pleasing," present participle of complacere "be very pleasing" (see complacence). Meaning "pleased with oneself" is from 1767. Related: Complacently.
〔李〕[com-;plac;-enta.] a.满足的，自满的，得意的 ←plac,pleas (L placere)=to please 取悦，使高兴