This is the 189th most frequent Vietnamese word.
nhanh
"Nhanh" means "fast" or "quick" in English.
In this sentence, 'nhanh' is used as an adjective to describe the manner in which the cat runs.
Con mèo này chạy rất nhanh.
This cat runs very fast.
Here, 'nhanh' is part of the adverb 'nhanh chóng', indicating that the work was completed in a short period of time.
Họ hoàn thành công việc một cách nhanh chóng.
They completed the work quickly.
In this case, 'nhanh' functions as an adverb modifying the verb 'ăn', suggesting urgency.