Where does “joynen” come from?

joynen (Middle English) comes from Old French joindre, from Vulgar Latin junior, from Latin iūnior, from Latin iuvenior, from Latin iuvenis, from Proto-Italic *juwō — young.

Ancestry of “joynen”, step by step

joynen traces back through 3 separate lines of ancestry.

via Old French joindre

Step	Language	Word	Meaning
1	Old French	joindre	to meet up with; to go and see; to join; to join...
2	Vulgar Latin	junior	Alternative form of iūnior
3	Latin	iūnior	—
4	Latin	iuvenior	younger, more youthful
5	Latin	iuvenis	young; A youth, a young man, young woman, young...
6	Proto-Italic	*juwō	young

via Old French juindre

Step	Language	Word	Meaning
1	Old French	juindre	Alternative form of joindre
2	Latin	iungo	I join

via Old French jungre

Step	Language	Word	Meaning
1	Old French	jungre	—

Every word from Proto-Italic *juwō →Every word from Latin iuvenis →Every word from Latin iuvenior →