The word "glessner" is spelled with a "gl" consonant cluster followed by the letter "e" and the letters "ssn" pronounced as a single syllable. The "e" is pronounced with a schwa sound, while the "ssn" is pronounced with a geminated dental fricative. The IPA transcription of "glessner" is /ˈɡlɛsnɚ/. The spelling of this word can be tricky due to the unusual combination of letters and sounds, but practicing the pronunciation can help to sharpen spelling skills.