Where does “θίξις” come from?

θίξις (Ancient Greek) comes from Greek θιγγάνω, from Ancient Greek -σῐς, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

θίξις (Ancient Greek): touching; touch

Definitions

touching; touch

Ancestry of “θίξις”, step by step

Step	Language	Word	Meaning
1	Greek	θιγγάνω	—
2	Ancient Greek	-σῐς	"suffix forming nouns"
3	Ancient Greek	-τις	retained after dentals
4	Proto-Indo-European	-tis	Derives abstract/action nouns from verb roots

Words derived from “θίξις”

thixotropic
thixotropy
nonthixotropic
ticseatrópacht
tixotropia
thixophobia
tixotropico

Every word from Proto-Indo-European -tis →Every word from Ancient Greek -σῐς →Every word from Ancient Greek -τις →