annihilation (n.) Look up annihilation at Dictionary.com
"act of reducing to non-existence," 1630s, from Middle French annihilation (restored from Old French anichilacion, 14c.), or directly from Medieval Latin annihilationem (nominative annihilatio), noun of action from past participle stem of annihilare "reduce to nothing" (see annihilate). The Annihilationists (1875) believed that the wicked were annihilated after death rather than sent to eternal suffering.