“천천히 말씀해 주세요” (cheon-cheon-hi mal-sseum-hae ju-se-yo) means “Please speak slowly.” It is a polite way to ask someone to slow down when speaking, especially if you are having trouble understanding them.
Example Sentences:
한국어가 서툴러서 천천히 말씀해 주세요. (han-gug-eo-ga seo-tul-leo-seo cheon-cheon-hi mal-sseum-hae ju-se-yo.) – I’m not fluent in Korean, so please speak slowly.
너무 빨리 말해서 이해하기 어려워요. 천천히 말씀해 주세요. (neo-mu ppal-li mal-hae-seo i-hae-ha-gi eo-ryeo-wo-yo. cheon-cheon-hi mal-sseum-hae ju-se-yo.) – You’re speaking too fast, so it’s hard to understand. Please speak more slowly.
제가 듣기 어려우니까 천천히 말씀해 주실 수 있나요? (je-ga deut-gi eo-ryeo-u-ni-kka cheon-cheon-hi mal-sseum-hae ju-sil su it-na-yo?) – I’m having trouble hearing, could you please speak slowly?