Jyutping
waan4 sek6 dim2 tau4
Pinyin
wán shí diǎn tóu
Definitions (CC-CANTO)
literally: 'even a piece of stone would have been moved', to be so patient and thorough in one's reasoning that all is convinced by it
Definitions (粵典–words.hk)
形容詞
形容人講道理講得好透徹，令人心服口服。 to be so patient and thorough in one's reasoning that others are convinced; literally: even a piece of stone would have been moved