underdo

Etymology

From Middle English underdon, from Old English underdōn (“to put under”), from Proto-Germanic *under + *dōną (“to put”). Equivalent to under- + do. Cognate with German unterthun (“to put under, subject”).

underdo means to do something insufficiently; especially, to undercook. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

verb

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.”
To do something insufficiently; especially, to undercook.; To do less than is requisite.“Near-synonyms: (of tasks) half-ass, shortchange, phone in”
To do something insufficiently; especially, to undercook.; To act below one's abilities; do less than one can.“Near-synonyms: underachieve, slack off”
To put under, subject.