The word "paroxismist" is a rare term used to describe a person who experiences or studies paroxysms, which are sudden outbursts or uncontrollable behaviors. The word is pronounced as pəˈrɒksɪmɪst with the stress on the second syllable. The spelling of this word is a combination of the root word "paroxysm" and the suffix "-ist," which denotes a person who practices or specializes in a particular field or activity. While not commonly used, "paroxismist" can be a useful term in discussions related to medical conditions and psychological disorders.
In geol., one who believes in the violent operations of nature rather than in ordinary and continued ones.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.