Mid 17th century; earliest use found in John Gadbury (1627–1704), astrologer. From classical Latin oblīviumoblivium or oblīviōn-, oblīviōoblivion + -ate.
Definition of obliviate in US English:
obliviate
verbəˈblɪvɪeɪt
rare
with objectTo forget, commit to oblivion.
Origin
Mid 17th century; earliest use found in John Gadbury (1627–1704), astrologer. From classical Latin oblīvium oblivium or oblīviōn-, oblīviō oblivion + -ate.