Where does “έγνοια” come from?

έγνοια (Byzantine Greek) comes from Ancient Greek ἔννοια, from Ancient Greek ἐννοέω, from Ancient Greek νοέω, from Ancient Greek νόος, from Ancient Greek σφαῖρα, from Ancient Greek -ειδής, from Ancient Greek -ής, from Proto-Indo-European -ēs — Creates action nouns or result nouns from verbs;...

Ancestry of “έγνοια”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἔννοια	the act of thinking, thought, consideration; the...
2	Ancient Greek	ἐννοέω	to mean; to consider, reflect upon
3	Ancient Greek	νοέω	to perceive, observe, see, notice; to think,...
4	Ancient Greek	νόος	mind; an act of mind; the sense or meaning of a...
5	Ancient Greek	σφαῖρα	ball, globe, sphere
6	Ancient Greek	-ειδής	like, connected to, from the nature of, full of;...
7	Ancient Greek	-ής	adjective suffix
8	Proto-Indo-European	-ēs	Primarily forms adjectival bahuvrīhi compounds
9	Proto-Indo-European	-ess	—
10	Proto-Indo-European	-os	Creates action nouns or result nouns from verbs;...

Every word from Proto-Indo-European -os →