The word "undercooper" may seem like a tricky spelling, but it actually follows typical English spelling rules. The first syllable is pronounced "uhn-duhr" and the second syllable is pronounced "koo-per". The "c" is followed by an "oo" sound, just like in the word "cooperate", and the "p" is followed by an "er" sound, like in the word "proper". So, phonetically, it's /ˈʌndərˌkuːpər/. Despite its unusual look, the spelling of "undercooper" is straightforward and easy to remember.