Where does “Sika-” come from?

Sika- (Proto-Austronesian) comes from Finnish Sika, from Proto-Finnic cika, from Proto-West Germanic tigā — she-goat.

Ancestry of “Sika-”, step by step

StepLanguageWordMeaning
1FinnishSikaPig the twelfth animal in the 12-year cycle in Chinese zodiac
2Proto-Finniccikapig
3Proto-West Germanictigāshe-goat

Words derived from “Sika-

Every word from Proto-West Germanic tigāEvery word from Proto-Finnic cikaEvery word from Finnish Sika