The spelling of the word "gresty" may seem unusual, but it follows the rules of English phonetics. The IPA phonetic transcription for "gresty" is /ˈɡrɛsti/. The "gr" consonant cluster represents a voiced velar stop followed by a voiced alveolar approximant. The letter "e" is pronounced as an open-mid front unrounded vowel, and the "-sty" ending is pronounced as /sti/. Although uncommon, this spelling pattern is not completely unique. For example, the word "vestry" follows a similar pattern.