Where does “ni” come from?

ni (Interlingua) comes from Spanish ni, from Old Spanish nin, from Latin nec, from Latin neque, from Proto-Indo-European nekʷe, from Proto-Indo-European ne — not.

ni (Interlingua): and not; Neither, nor; And, or

Definitions

and not; Neither, nor; And, or

Ancestry of “ni”, step by step

Step	Language	Word	Meaning
1	Spanish	ni	neither... nor; nor, or; not even, even
2	Old Spanish	nin	—
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

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