Where does “incessive” come from?

incessive (English) comes from Latin incesso, from Latin incedo, from Latin in-, from Latin in, from Old Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

incessive (English): Intense and active; Fierce; cruel and aggressive;...

Definitions

Intense and active; Fierce; cruel and aggressive;...

Ancestry of “incessive”, step by step

Step	Language	Word	Meaning
1	Latin	incesso	I assault, assail, attack, fall upon; I reproach,...
2	Latin	incedo	to walk, stride, step, march (along)
3	Latin	in-	un-, non-, not; in, within, inside
4	Latin	in	in, at, on, upon, from; within, while in; into,...
5	Old Latin	en	in
6	Proto-Italic	en	in
7	Proto-Indo-European	h₁én	in

Every word from Proto-Indo-European h₁én →Every word from Proto-Italic en →Every word from Latin in- →