từ tốn
sɐŋnjɐŋhɐdɐ saŋnjaŋhɑːdə təbi dʒɛntəl slaʃ kaɪnd ɔːɹ ɐ fɹeɪz laɪk tɕʌmdʑɐnɯn thɛdo dʒɪɒmdʒɐnjuːn tiːdəʊ pəlaɪt slaʃ dʒɛntəl atɪtjuːd
In Korean 상냥하다 (sangnyanghada - to be gentle/kind), or a phrase like 점잖은 태도 (jeomjaneun taedo - polite/gentle attitude)
Describing a person's gentle and courteous manner, especially in speech and behavior.
Example
"Cô ấy luôn nói chuyện rất từ tốn."