platysma

The story

1. Ancient Greek · derived fromπλᾰ́τῠσμᾰ“flat object”
2. New Latin · borrowed fromplatysma
3. English todayplatysma

Borrowed from New Latin platysma, from Ancient Greek πλᾰ́τῠσμᾰ (plắtŭsmă, “flat object”), from πλᾰτῠ́νω (plătŭ́nō, “widen”) + -μᾰ (-mă, “nominal suffix”).