WordNet
add to
v. have an increased effect; "This adds to my worries"
Usage examples of "add to".
He had to plan for the worst, then assume that his imagination was not up to the reality and add to his plans.
There were a lot of people including myself, I might as well say who didn't think the top execs would want to add to those problems by shouting to the world that we'd found an old mine site, probably of great historical interest.
I have a catalog of places and things, which I can add to at your request.
With appropriately large sails, they could have also made use of the solar wind to add to their velocity.