Where does “-odon” come from?

-odon (Old English) comes from Ancient Greek ὀδούς, from Proto-Hellenic odónts, from Proto-Indo-European h₃dónts, from Proto-Indo-European h₁ed- — to eat.

Ancestry of “-odon”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ὀδούς	A tooth, tusk; anything pointed: spike, prong;...
2	Proto-Hellenic	odónts	tooth
3	Proto-Indo-European	h₃dónts	tooth
4	Proto-Indo-European	h₁ed-	to eat

Words derived from “-odon”

turned
wanted
needed
placed
established
paid
stopped
accepted
marked
advanced
experienced
informed
distinguished
collected
faced
armed
devoted
headed
lifted
accomplished
buried
educated
fired
accused

Every word from Proto-Indo-European h₁ed- →

-odon — Etymology, Origin & Word History | Etymology Explorer