으니깐

Casual 'because / since'

-으니깐 is the everyday spoken pronunciation of -으니까 'since, because', and means exactly the same thing: 주말에는 사람이 많으니깐 조심하세요 'be careful, since it gets crowded on weekends.' The extra ㄴ is just how people say it; you would write -으니까. Every line here is relaxed speech giving a reason for the advice or comment that follows.

Register: casual speech