Where does “serão” come from?

serão (Old Portuguese) comes from Vulgar Latin seranum, from Latin sērus, from Proto-Italic swerjos, from Proto-Indo-European swer-yo-s, from Proto-Indo-European swer- — to ache; to fester; wound; injury.

Ancestry of “serão”, step by step

StepLanguageWordMeaning
1Vulgar Latinseranum—
2Latinsēruslate, too late
3Proto-Italicswerjos—
4Proto-Indo-Europeanswer-yo-s—
5Proto-Indo-Europeanswer-to ache; to fester; wound; injury
Every word from Proto-Indo-European swer- →Every word from Proto-Indo-European swer-yo-s →Every word from Proto-Italic swerjos →