underdo

verb4

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.
   • Sorry to say, I've underdone the downspout repair. I think we'd better hire someone to replace the whole thing.
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. •
   (no longer used) To put under, subject.