Pronunciation: [hˈa͡ɪd͡ʒiːnˌɪksɪz] (IPA) 
The word "hygienicses" is a non-standard pluralization of the word "hygienics". The correct pluralization of "hygienics" is simply "hygienics". The spelling of "hygienicses" can be explained using the International Phonetic Alphabet (IPA) as /haɪ'dʒiː.nɪk.sɪz/. The "-es" suffix is added to the base word "hygienics" to create the plural form. However, this spelling is not commonly used or recognized in standard English.
There is no such word as "hygienicses" in the English language. It appears to be a non-standard or nonexistent term, so there is no established etymology for it. However, if you are referring to the plural form of "hygienics", the etymology of that word can be explained.
The word "hygienics" is derived from the Greek word "hygieinē" meaning "healthy". In the late 18th century, it was adapted into English with the addition of the suffix "-ics", which denotes a field of study or practice. Therefore, "hygienics" refers to the principles and practices of maintaining health and preventing disease.
