This is the 156th most frequent Vietnamese word.
xuống
"Xuống" means "to go down" or "to descend."
The word 'xuống' is used here to indicate downward motion along the stairs.
Tôi đi xuống cầu thang.
I go down the stairs.
The word 'xuống' is used here to indicate the action of moving into a sitting position.
Nam ngồi xuống ghế.
Nam sits down on the chair.
The word 'xuống' is used here metaphorically to signify recording information in writing.