adverb
Etymology: Middle English, from everlasting + -ly
1. : in an everlasting manner
his name will be everlastingly remembered
a bird whose plumage remains everlastingly green — Publ's Mod. Lang. Association of American
this shoe wears everlastingly
he was everlastingly whining
2. : most certainly or completely : immeasurably
splendidly and everlastingly right in his determination not to be pressured into war — New Republic