The word "ptyalogogues" is not a common word that one hears or reads. It is a medical term used to describe substances that cause an excessive production of saliva. The word is spelled as /taɪæləɡɒɡz/ in the International Phonetic Alphabet. The spelling of this word can be challenging due to the combination of silent letters and unusual letter combinations. However, with practice and familiarity, one can master the spelling of this and many other technical words.
Medicines that promote discharges of saliva.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.