Today's Hawaiian Word of the Day is most often used as a place name. Kapiʻolani is a medical center, a tree-lined boulevard, a park, a school, a playground, and so much more. All are named for Queen Kapiʻolani, wife of Kalākaua. Literally, it means “the arch of heaven,” and refers to the beautiful rainbows so frequently seen in Hawaiʻi. Rainbows signify the presence of royalty in old Hawaiʻi.