눈치
tʃatuː jantuː ɡwɑːnwɒn sɛfɔː tʃatuː jatuːn ɡwɑːwɒnn sɛfɔː tʊ ɒbzɜːv wɜːdz and ɛkspɹɛʃənz bʌt nʌntʃaɪ ɪz mɔː ɐbaʊt ðɪ ɪntjuːɪtɪv ʌndəstandɪŋ ɒvðə sɪtʃuːeɪʃən
In Chinese 察言观色 (chá yán guān sè) - to observe words and expressions, but 'nunchi' is more about the intuitive understanding of the situation.
The ability to quickly perceive and understand the unspoken social cues and the atmosphere of a situation, allowing one to act accordingly.
Example
"눈치가 빠르니까 금방 알아챘네."