English
everlastingly
From everlasting + -ly.
A compound of everlasting + -ly
Middle English ever ‘at all times, always, constantly’
Middle English ever-lasting ‘(adjective) eternal, perpetual’
English everlasting
Today it means
adv In an everlasting manner; without end; forever.
Language periods are conventional ranges, not dates for this word.
Etymograph / everlastingly