This is the 127th most frequent Vietnamese word.
thi
The Vietnamese word "thi" can mean "exam," "test," or "to take an exam/test," depending on context.
Here, 'thì' is used as a conjunction to indicate a conditional result (then).
Nếu bạn học chăm chỉ, thì bạn sẽ thành công.
If you study hard, then you will succeed.
In this case, 'thi' is used as a noun meaning 'competition' or 'exam'.
Cuộc thi vừa rồi rất khó.
The recent competition was very tough.
Here, 'thi' is employed as a verb meaning 'to take an exam'.