This is the 962nd most frequent Estonian word.
oluline
"Important" or "significant."
The word 'oluline' is used here as an adjective describing the noun 'probleem,' indicating its importance.
See probleem on väga oluline.
This issue is very important.
In this sentence, 'oluline' functions as part of an idiomatic expression, equivalent to 'it is important' in English, emphasizing advice.
Oluline on siin mitte kiirustada.
It is important here not to rush.
Here 'oluline' is used in its comparative form 'olulisem,' showing a comparison of importance between two aspects of work.