Where does “filariases” come from?

filariases (English) comes from English filaria, from Translingual Filaria, from Translingual -aria, from Latin -āria, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “filariases”, step by step

filariases traces back through two separate lines of ancestry.

via English filaria

StepLanguageWordMeaning
1EnglishfilariaAny of the parasitic nematode worms of...
2TranslingualFilariagenus
3Translingual-ariaone like
4Latin-āriaused to form feminine counterparts of masculine agent nouns in
5Latin-āriuser
6Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

via English iases

StepLanguageWordMeaning
1Englishiases
Every word from Proto-Italic *-āziosEvery word from Latin -āriusEvery word from Latin -āria