Where does “notieren” come from?

notieren (Middle High German) comes from Latin notō, from Latin -ō, from Proto-Indo-European -ō — Derives nouns from roots.

Ancestry of “notieren”, step by step

Step	Language	Word	Meaning
1	Latin	notō	to mark, make a mark
2	Latin	-ō	suffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
3	Proto-Indo-European	-ō	Derives nouns from roots