死口唔認 (sei2 hau2 m4 jing6) — adamantly deny in Cantoneseseiˊ²死hauˊ²口mˎ₄唔jingˍ₆認简 死口唔认Mandarin Pinyin: si3 kou3 wu2 ren4Meaning of 死口唔認nounadamantly deny