Where does “kagab-i” come from?

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

Ancestry of “kagab-i”, 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-