Where does “igual” come from?

igual (Old Portuguese) comes from Latin aequalis, from Latin -alis, from Proto-Indo-European -li-.

Ancestry of “igual”, step by step

StepLanguageWordMeaning
1Latinaequalisequal, like; comparable, contemporary; coeval,...
2Latin-alisUsed to form adjectives of relationship from...
3Proto-Indo-European-li-—
Every word from Proto-Indo-European -li- →Every word from Latin -alis →Every word from Latin aequalis →