From New Latin elasticus (“elastic”), from Ancient Greek as if *ἐλαστής (*elastḗs) for ἐλατής (elatḗs), equivalent to ἐλατήρ (elatḗr, “a driver, hurler”), from ἐλαύνειν (elaúnein, “to drive, set in motion, push, strike, beat out”).
Practice speaking and memorizing "elástico" and many other words and sentences in Portuguese.