Where does “negatif” come from?

negatif (Old French) comes from Latin negativus, from Latin negō, from Latin nec, from Latin neque, from Proto-Indo-European nekʷe, from Proto-Indo-European ne — not.

Ancestry of “negatif”, step by step

Step	Language	Word	Meaning
1	Latin	negativus	denied, negative, that which denies; inhibiting
2	Latin	negō	to deny
3	Latin	nec	nor; and not, not; neither
4	Latin	neque	not; and not, also not
5	Proto-Indo-European	nekʷe	and not, neither, nor
6	Proto-Indo-European	ne	not

Words derived from “negatif”

Every word from Proto-Indo-European ne →Every word from Proto-Indo-European nekʷe →Every word from Latin neque →