Where does “em contramão” come from?

em contramão (Portuguese) comes from Portuguese em, from Old Portuguese en, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

em contramão (Portuguese): against the flow of traffic, in the wrong lane

Definitions

against the flow of traffic, in the wrong lane

Ancestry of “em contramão”, step by step

em contramão traces back through two separate lines of ancestry.

via Portuguese em

Step	Language	Word	Meaning
1	Portuguese	em	in; inside; within; on; on top of; in; at
2	Old Portuguese	en	in
3	Latin	în	in, at, on, upon, from (space)
4	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
5	Proto-Italic	en	in
6	Proto-Indo-European	h₁én	in

via Portuguese mão

Step	Language	Word	Meaning
1	Portuguese	mão	hand
2	Old Portuguese	mão	hand
3	Latin	malus	unpleasant, distressing, painful, nasty, bad;...
4	Ancient Greek	μηλέα	apple tree
5	Ancient Greek	μῆλον	apple; any fruit from a tree; a woman's breast
6	Proto-Indo-European	(s)meh₁l-	small animal”; small animal

Every word from Proto-Indo-European h₁én →