Meaning

verb come or bring to a finish or an end

verb bring to a whole, with all the necessary parts or elements

verb complete or carry out

originFrom Middle English compleet (“full, complete”), borrowed from Old French complet or Latin completus, past participle of compleō (“to fill up, to complete”) (whence also complement, compliment), from com- + pleō (“to fill, to fulfill”) (whence also deplete, replete, plenty), ultimately from Proto-Indo-European *pleh₁- (“to fill”) (English full).

Etymology from Wiktionary, CC BY-SA 3.0