The spelling of the word "erce" may seem unusual, but it follows the rules of English phonetics. It is pronounced as /ɜːs/ or "erse". The "e" represents the vowel sound that is pronounced in the middle of the mouth with the tongue slightly raised and pushed back. The "r" sound is pronounced with a slight roll or trill, before transitioning to the "s" sound. While the spelling may be uncommon, the word "erce" is a valid English word meaning "stubborn" or "difficult to work with."