Where does “avancen” come from?

avancen (Middle English) comes from Anglo-Norman avauncer, from Vulgar Latin abantiare, from Late Latin abante, from Latin ab ante, from Latin ante, from Ancient Greek κλίσις, from Ancient Greek -σῐς, from Ancient Greek -τις — Derives abstract/action nouns from verb roots.

Ancestry of “avancen”, step by step

avancen traces back through 3 separate lines of ancestry.

via Anglo-Norman avauncer

Step	Language	Word	Meaning
1	Anglo-Norman	avauncer	—
2	Vulgar Latin	abantiare	—
3	Late Latin	abante	before, in front of
4	Latin	ab ante	in front, before
5	Latin	ante	before, in front, forwards; before; before,...
6	Ancient Greek	κλίσις	bending, inclination; a lying down; a place for...
7	Ancient Greek	-σῐς	"suffix forming nouns"
8	Ancient Greek	-τις	retained after dentals
9	Proto-Indo-European	-tis	Derives abstract/action nouns from verb roots

via Old French avancier

Step	Language	Word	Meaning
1	Old French	avancier	to advance; to move forward; to advance; to...
2	Vulgar Latin	abanteare	present active infinitive of *abanteō;...

via Old French avancer

Step	Language	Word	Meaning
1	Old French	avancer	Alternative form of avancier; to move forward

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