Doest

verb

1. (auxiliary) A syntactic marker.
2. To perform; to execute.

   "All you ever do is surf the Internet. What will you do this afternoon?"

3. To cause, make (someone) (do something).
4. To suffice.

   "it’s not the best broom, but it will have to do;  this will do me, thanks."

5. To be reasonable or acceptable.

   "It simply will not do to have dozens of children running around such a quiet event."