「一無所知」

(pos:動詞)
<explanation>
yue:一啲認識都冇，完全唔知道
eng:to know nothing about; to be absolutely ignorant of
<eg>
yue:佢喺孤兒院長大，對自己嘅身世一無所知。 (keoi5 hai2 gu1 ji4 jyun2 zoeng2 daai6, deoi3 zi6 gei2 ge3 san1 sai3 jat1 mou4 so2 zi1.)
eng:He grew up in the orphanage, knowing nothing about his own background.