Where does “pinalamig” come from?

pinalamig (Tagalog) comes from Tagalog pa-, from Proto-Austronesian pa- — causative prefix.

Ancestry of “pinalamig”, step by step

Step	Language	Word	Meaning
1	Tagalog	pa-	"adverbial prefix" - "Indicates process of...
2	Proto-Austronesian	pa-	causative prefix