Where does “kasing-” come from?

kasing- (Tagalog) comes from Tagalog Ka-, from Proto-Malayo-Polynesian ka-, from Proto-Austronesian ka- — inchoative.

Ancestry of “kasing-”, step by step

StepLanguageWordMeaning
1TagalogKa-implies companionship or partnership
2Proto-Malayo-Polynesianka-marker of past time in temporal expressions
3Proto-Austronesianka-inchoative
Every word from Proto-Austronesian ka- →Every word from Tagalog Ka- →Every word from Proto-Malayo-Polynesian ka- →
kasing- — Etymology, Origin & Word History | Etymology Explorer