Tetterous is a word that describes a skin condition that is characterized by dry, scaly, and itchy patches on the skin. The word is spelled with a double T, which is represented in IPA transcription as /tɛtərəs/. The first T sound is pronounced with a slight release of air, while the second T sound is a true stop consonant. The "OU" in the middle of the word is pronounced as a short "e" sound, and the final "ous" is pronounced as "uhs." With its unique spelling, tetterous can be a challenging word to spell correctly without knowledge of its pronunciation.
Having the character of a tetter.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.