Underdo

Verb

1. To do something insufficiently; especially, to undercook.

   "Sorry to say, I've underdone the pot roast. I think we'd better put it back in the oven for a bit."

2. To do less than is requisite.

   "We warned him not to underdo it. This customer expects attention to detail."

3. To act below one's abilities; do less than one can.
4. To put under, subject.