Definition of "underdo" in English

verb

1. (transitive) 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. (transitive, obsolete) To put under, subject.