Senses
嗳/ 噯 [disagreement/denial]
Used to express disagreement, denial, or disapproval, meaning "no" or "don't"
嗳/ 噯 to belch
(bound form) To belch or burp
嗳/ 噯 [regret/surprise]
Used to express regret, annoyance, disappointment, or surprise
嗳/ 噯 [acknowledgement]
Used to respond to someone to show agreement or acknowledgement