hey
From Longman Dictionary of Contemporary Englishheyhey /heɪ/ ●●○ interjection 1 ATTENTIONSURPRISEDa shout used to get someone’s attention or to show surprise, interest, or annoyance Hey, wait a minute!2 informal hello Hey, what’s up?3 → but heyExamples from the Corpushey• Hey, girl, what's up?• Hey, those are mine.Origin hey (1100-1200) A natural shout