underset

verb

1. (transitive)To set under or beneath.

   “How it was shaped up with proper foreway and under-set for dished wheels, or how iron "clouts" (with "clout-nails") were carefully fitted into it to take the wear — is all but gone from my memory, as indeed it was hardly worth storing [...]”

2. To prop or support.

   “being a company at that time , and well underset with rich men , and good order”

   “Unless posts are underset in very steep mines they are apt to fall out before the pressure of the roof has tightened them. Posts are sometimes too much underset, owing to their being too long.”

noun

1. undercurrent (of water)