Where does “kesihatan” come from?

kesihatan (Malay) comes from Malay sihat, from Persian صحت, from Arabic صِحَّة.

kesihatan (Malay): health

Definitions

kesihatan traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Malay	sihat	healthy
2	Persian	صحت	healthiness; validity, correctness
3	Arabic	صِحَّة	—

Step	Language	Word	Meaning
1	Malay	ke- -an	ness; appended to adjectives to form nouns meaning "the state of (the adjective)", "the quality of (the adjective)", or "the measure of (the adjective)"
2	Proto-Malayic	*kə- -an	—
3	Proto-Austronesian	*ka- -an	—