Where does “nó” come from?

nó (Portuguese) comes from Old Portuguese no, from Old Portuguese eno, from Old Portuguese en, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

nó (Portuguese): knot

Definitions

knot

Ancestry of “nó”, step by step

Step	Language	Word	Meaning
1	Old Portuguese	no	—
2	Old Portuguese	eno	—
3	Old Portuguese	en	in
4	Latin	în	in, at, on, upon, from (space)
5	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
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 en →