Where does “nosocomial” come from?

I need to work through this etymology chain carefully, working backwards from the headword. The chain given is: English -al | English aldehyde | Ancient Greek νόσος | Proto-Indo-European kem(H)- Wait, let me reconsider. The chain notation "newest to oldest" should read right to left as oldest to newest: - Proto-Indo-European kem(H)- (oldest) - Ancient Greek νόσος (nósos) - English aldehyde (?) - English -al (newest) This chain seems problematic. "Aldehyde" doesn't fit in an etymology for "nosocomial." Let me reconsider what's being shown. Actually, looking at "nosocomial" - it comes from Ancient Greek νόσος (nósos) meaning "disease" + -komai (hospital/place). The "-al" is an

nosocomial (English): Arising from hospital treatment or environment;...

Definitions

  1. Arising from hospital treatment or environment;...

Ancestry of “nosocomial”, step by step

StepLanguageWordMeaning
1Latinnosocomīumhospital, infirmary
2Ancient Greekνοσοκομεῖονinfirmary, hospital
3Ancient Greekνοσοκομέωto be under medical treatment
4Ancient Greekνόσοςsickness, disease, illness; plague; misery,...
5Ancient Greek-λογίαBase for nouns denoting the study of something,...
6Ancient GreekλόγοςThat which is said: word, sentence, speech,...
7Ancient GreekλέγωI put in order, arrange, gather; I choose, count,...
8Proto-Indo-Europeanleǵ-to gather, collect, with derivatives meaning to...

Words derived from “nosocomial

Every word from Proto-Indo-European leǵ-Every word from Ancient Greek -λογίαEvery word from Ancient Greek λέγω