Po
tɕondɛmmɐɫ dʒɒndiːtməl ɒnɔːɹɪfɪk laŋɡwɪdʒ bʌt nɒtə sɪŋɡəl wɜːd tɪldə jo jəʊ ɐ pəlaɪtnəs mɑːkəɹ at ðɪ ɛnd əvə sɛntəns
In Korean 존댓말 (jondaetmal) - honorific language (but not a single word); ~요 (yo) - a politeness marker at the end of a sentence.
A particle used at the end of a sentence to show respect and politeness, especially when addressing elders or those in authority.
Example
"Salamat po."