Etymology of the Greek word diabolikos (διαβολικός)
the Greek word diabolikos, διαβολικός
derived from the Greek word diabolos, διάβολος (a traducer; specially, Satan)
derived from the Greek word diaballein, διαβάλλω (to slander, attack; literally 'to throw across')
derived from the Greek word dia, διά (through, between)