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안녕 vs 안녕하세요

音節を足すのは芝居ではない。部屋を印す。

解説は英語です。韓国語の行と意味は選んだ言語です。

안녕하세요 is the default with anyone you do not drink with yet: staff, landlords, your boss, a stranger on the phone.

안녕 is for kids, close friends, and people who already switched to 반말. Using it on a clerk is not 'casual cool'. It is rank-blind.

안녕히 가세요 (they stay, you leave) vs 안녕히 계세요 (you stay, they leave). Get this wrong and you still survive. Get 안녕 wrong and the air changes.

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