This is an obscure word one rarely encounters. It’s a Tagalog transliteration of the Spanish word arcoíris.
arkuiris
rainbow
Most Filipinos would simply use the English word these days. The standard Tagalog word for “rainbow” is bahaghari, which literally means “king’s loincloth.”
KAHULUGAN SA TAGALOG
arkuiris: bahaghari, balangaw, bahagsubay
