Where does “paranoidism” come from?

paranoidism (English) comes from English paranoid, from English -oid, from Latin -oides, from Greek -ο, from Ancient Greek εἶδος, from Spanish -scopio, from Latin -scopium, from Ancient Greek σκοπέω — to see, to look, to observe.

Ancestry of “paranoidism”, step by step

paranoidism traces back through two separate lines of ancestry.

via English paranoid

StepLanguageWordMeaning
1EnglishparanoidOf, related to, or suffering from paranoia;...
2English-oidOf similar form to, but not the same as. Having...
3Latin-oides-like, -form
4Greek-οending for accusative singular forms (eg δρόμος, ψήφος); and some vocative singular forms
5Ancient GreekεἶδοςThat which is seen: form, image, shape;...
6Spanish-scopio-scope
7Latin-scopium
8Ancient GreekσκοπέωI look, look at, behold; I examine, inspect; 413...
9Ancient Greekσκοπόςwatcher, lookout; protector, guardian; spy, scout
10Ancient GreekσκέπτομαιI look at, examine; I examine, consider, think
11Proto-Hellenicsképťomaito look at
12Proto-Indo-Europeanspéḱyetito be looking at, to keep looking at
13Proto-Indo-Europeanspeḱ-to see, to look, to observe

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European speḱ-Every word from Proto-Indo-European spéḱyetiEvery word from English -oid
paranoidism — Etymology, Origin & Word History | Etymology Explorer