Where does “antiquarist” come from?

antiquarist (English) comes from English antiquary, from Latin antiquarius, from Latin antīquus, from Latin ante, from Ancient Greek κλίσις, from Ancient Greek -σῐς, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

Ancestry of “antiquarist”, step by step

antiquarist traces back through two separate lines of ancestry.

via English antiquary

StepLanguageWordMeaning
1EnglishantiquaryA person who is knowledgeable of, or who collects...
2Latinantiquariusancient, antique; antiquarian, antiquary
3Latinantīquusold, ancient
4Latinantebefore, in front, forwards; before; before,...
5Ancient Greekκλίσιςbending, inclination; a lying down; a place for...
6Ancient Greek-σῐς"suffix forming nouns"
7Ancient Greek-τιςretained after dentals
8Proto-Indo-European-tisDerives abstract/action nouns from verb roots

via English ist

StepLanguageWordMeaning
1EnglishistA practitioner or supporter of an ism
2English-istAdded to words to form nouns denoting
3Old French-iste
4Latin-ista-ist; one who practises or believes
5Ancient Greek-ιστήςAlternative form of -τής; -ist
6Ancient Greek-τήςAppended to verbs to form agent nouns
7Proto-Hellenic-tās
Every word from Proto-Indo-European -tisEvery word from Ancient Greek -σῐςEvery word from Ancient Greek κλίσις