Where does “sivlar” come from?

sivlar (Old Portuguese) comes from Latin sibilare, from Latin sibilo, from Latin -o, from Proto-Italic -ōd, from Proto-Indo-European -éad.

Ancestry of “sivlar”, step by step

StepLanguageWordMeaning
1Latinsibilarepresent active infinitive of sībilō;...
2LatinsibiloI hiss; I whistle
3Latin-oforms masculine agent nouns, positive and...
4Proto-Italic-ōd—
5Proto-Indo-European-éad—
Every word from Proto-Indo-European -éad →Every word from Latin -o →Every word from Latin sibilo →