This is the 187th most frequent Vietnamese word.
cái
The Vietnamese word "cái" is a classifier used for most tangible, inanimate objects.
Here, 'cái' is a classifier used for desk (bàn), specifying a singular noun.
Cái bàn này rất lớn.
This table is very big.
In this sentence, 'cái' denotes an abstract concept or quality, such as 'the beauty'.
Cái đẹp thật là đáng trân trọng.
Beauty is truly respectable.
'Cái' functions as a classifier for shirt (áo), used to indicate individual items.