Where does “fortão” come from?

fortão (Portuguese) comes from Portuguese forte, from Old Portuguese forte, from Latin fortis, from Old Latin forctis, from Proto-Italic forktis, from Proto-Indo-European bʰerǵʰ- — to rise; high, lofty; hill, mountain.

Ancestry of “fortão”, step by step

StepLanguageWordMeaning
1Portuguesefortestrength pronounced quality, strong suit
2Old Portuguesefortestrong; powerful; strong; fast moving etc;...
3Latinfortisstrong, powerful; firm, resolute, steadfast,...
4Old Latinforctisstrong
5Proto-Italicforktisstrong, robust
6Proto-Indo-Europeanbʰerǵʰ-to rise; high, lofty; hill, mountain
Every word from Proto-Indo-European bʰerǵʰ-Every word from Proto-Italic forktisEvery word from Old Latin forctis