This is the 407th most frequent Vietnamese word.
mới
"New" or "just".
Here, 'mới' combined with 'vừa' emphasizes the timing of the action as recent; it acts as an adverbial modifier.
Tôi vừa mới ăn sáng xong.
I just finished having breakfast.
In this sentence, 'mới' serves as an adjective describing the noun 'house' to indicate its new condition.
Chúng tôi vừa mua nhà mới.
We just bought a new house.
Here, 'mới' implies 'just' or 'only,' used as an adverb to express the short amount of time passed.