Hi there, I have a question of how to properly understand those greatings. I am a Pole speaking 3 languages, one of them is Czech but I do not understand everything yet. While I'm in CR I figured out that I can say cau only to those that I know (like friends or co-workers), ahoj is for the people that I often see but don't know directly... Now cest is for close friends only? Then what about nazdar? I can see ppl say nazdar with a smile so I understand it's like cau but more often they say nazdar if they don't like somebody... I don't get it if some ppl don't like each other then why they great each other? Don't know if I'm right about that last one but this is all I figured out living in Czech Republic. Thanks. btw. What can I say to my neighbor different than Dobry den/odpoledne/vecer? Is saying ahoj or nazdar too much if do not know them, just live in the same building? When I can start using ahoj/cau/cest/cus and do not risk of being understand awkward?