There are some variations in the spelling of the word "hayo", with some opting for "heyo" or "hey-oh". The phonetic transcription of this word is represented as /ˈheɪoʊ/ which indicates the first syllable is pronounced 'hay' as in the word hay bale, followed by 'oh' with a long 'o' sound. In spoken language, the stress is usually placed on the first syllable. This word is commonly used as an exclamation of greeting or encouragement.