Where does “Cagalingan” come from?

Cagalingan (Tagalog) comes from Tagalog kagalingan, from Tagalog ka- -an, from Proto-Austronesian *ka- -an.

Ancestry of “Cagalingan”, step by step

Step	Language	Word	Meaning
1	Tagalog	kagalingan	goodness; healing
2	Tagalog	ka- -an	—
3	Proto-Austronesian	*ka- -an	—