This is the 44th most frequent Vietnamese word.
giảm
"Giảm" means "reduce" or "decrease."
In this sentence, 'giảm' refers to lowering intensity, specifically the volume of sound.
Họ đã quyết định giảm âm lượng vì trời đã tối.
They decided to lower the volume because it was already late.
Here, 'giảm' indicates a reduction or decrease in quantity, specifically referring to the price of gasoline.
Giá xăng đã giảm đáng kể.
The gasoline price has significantly decreased.
In this context, 'giảm' means to lower or reduce, associated with body weight.