If you borrow a thing that belongs to another person, you utilize it for your period of time then return it. As a primary verb, it denotes action. 'To complete' one thing is "to carry out, take portion in, or accomplish a thing." Here's how the verb is conjugated https://financefeeds.com/circle-surges-168-in-blockbuster-nyse-debut-valued-over-18-billion/