Used as an exclamation to express surprise, wonder, or admiration; similar to "Oh!" or "My!"

Used as an exclamation to express physical pain, often appearing in the compound 哎唷 āi​yō

Used at the end of a sentence to express admiration, encouragement, or to soften the tone of a command

(bound form) Used in the compound 哼唷 hēng​yō to represent the sound of physical exertion