「切勿」

(pos:動詞)
<explanation>
yue:（正式）千祈唔好做一啲嘢
eng:(formal) do not; be sure not to
<eg>
yue:切勿亂拋垃圾。 (cit3 mat6 lyun6 paau1 laap6 saap3.)
eng:No littering.