underheat

/ˌʌndərˈhiːt/
verb
  1. To heat something less than is needed or desired.
    • If you underheat the oven, the bread will not rise properly.
    • The technician warned that underheating the metal could make it brittle.
    • Be careful not to underheat the wax, or it won't spread evenly.
Antonyms