Where does “contrariar” come from?

contrariar (Portuguese) comes from Portuguese -ar, from Old Portuguese -ar, from Latin -are, from Latin -o, from Proto-Italic -ōd, from Proto-Indo-European -éad.

contrariar (Portuguese): to counter; to counteract; to contradict

Definitions

to counter; to counteract; to contradict

Ancestry of “contrariar”, step by step

Step	Language	Word	Meaning
1	Portuguese	-ar	forms the impersonal infinitive of...
2	Old Portuguese	-ar	—
3	Latin	-are	present active infinitive of -ō; -āre;...
4	Latin	-o	forms masculine agent nouns, positive and...
5	Proto-Italic	-ōd	—
6	Proto-Indo-European	-éad	—

Every word from Proto-Indo-European -éad →Every word from Portuguese -ar →Every word from Latin -o →