Where does “adjuvamentum” come from?

adjuvamentum (Latin) comes from Latin adjuvare, from Latin ad, from Proto-Italic ad, from Proto-Indo-European h₂éd — to, at.

Ancestry of “adjuvamentum”, step by step

Step	Language	Word	Meaning
1	Latin	adjuvare	present active infinitive of adjuvō;...
2	Latin	ad	toward, to; up to; near, by, close by, at, to
3	Proto-Italic	ad	toward, to, on, up to, for
4	Proto-Indo-European	h₂éd	to, at

adjuvamentum — Etymology, Origin & Word History | Etymology Explorer