Where does “voluntarily” come from?
Voluntarily derives from English voluntary plus the adverb-forming suffix -ly, tracing through Middle English -ly and Old English -līċ to Latin voluntarius, meaning "of one's own will," itself from Latin -arius and ultimately Proto-Indo-European roots.
voluntarily (English): In a voluntary manner
Ancestry of “voluntarily”, step by step
Words derived from “voluntarily”