Definition of maleficial in English:

maleficial

adjective

archaic
  • Malefic, maleficent.

Origin

Early 17th century; earliest use found in Philemon Holland (1552–1637), translator. Either from classical Latin maleficus + -ial, or formed after beneficial with substitution of classical Latin male- badly for bene- well.

Pronunciation

maleficial

/ˌmalɪˈfɪʃl/