Ahjumma: an older female, typically the age of a mother or aunt, but not your motherAhjusshi: an older male, typically the age of a father or uncle, but not your father
Aish: expression of frustration/irritation
Aja: see fighting or hwaiting
Ani/Anyo: no
Annyeong: hello/goodbye, when you are close to someone only.
Annyeonghaseyo: hello, goodbye
Annyeonghigaseyo: goodbye only ("I'll leave first")
Antis: people who aren't fans and go out of their way to criticize and attack the artists they don't like