This is the 745th most frequent Vietnamese word.
sụt
"Sụt" means "to drop," "to sink," or "to decrease" in English, depending on context.
sụt lở means a landslide; 'sụt' implies falling or collapsing downward.
Trời hôm nay mưa khiến sụt lở đất.
Today's rain caused a landslide.
'sụt cân' relates to weight loss; 'sụt' indicates a reduction in quantity.
Cô ấy cảm thấy hơi sụt cân sau kỳ nghỉ dài.
She feels she has lost a bit of weight after the long holiday.
sụt tốc độ means a sudden decrease in speed; 'sụt' conveys the idea of rapid decline.