Where does “roa” come from?

roa (Portuguese) comes from Portuguese roer, from Old Portuguese roer, from Latin rodere, from Latin rodo, from Proto-Indo-European rōd-, from Proto-Indo-European reh₁d- — to scrape, scratch, gnaw.

roa (Portuguese): inflection of roer: ## first/third-person...

Definitions

inflection of roer: ## first/third-person...

Ancestry of “roa”, step by step

Step	Language	Word	Meaning
1	Portuguese	roer	to gnaw
2	Old Portuguese	roer	—
3	Latin	rodere	second-person singular future passive indicative...
4	Latin	rodo	I gnaw, nibble, bite; eat or waste away, corrode,...
5	Proto-Indo-European	rōd-	—
6	Proto-Indo-European	reh₁d-	to scrape, scratch, gnaw

Every word from Proto-Indo-European reh₁d- →Every word from Proto-Indo-European rōd- →Every word from Latin rodo →