Where does “festwachsen” come from?

festwachsen (German) comes from Luxembourgish fest-, from German fëst, from Middle High German fëst, from Latin festum, from Latin fēstus, from Proto-Italic fēstos.

festwachsen (German): to grow on; to take root; to increase

Definitions

to grow on; to take root; to increase

Ancestry of “festwachsen”, step by step

Step	Language	Word	Meaning
1	Luxembourgish	fest-	firm, steady
2	German	fëst	—
3	Middle High German	fëst	—
4	Latin	festum	a holiday, festival; a banquet, feast
5	Latin	fēstus	Of or pertaining to holidays; festive, festal, joyful, merry
6	Proto-Italic	fēstos	—

Every word from Proto-Italic fēstos →Every word from Latin fēstus →Every word from Latin festum →