This is the 977th most frequent Estonian word.
avab
"Avab" means "opens" in English.
In this sentence, the verb 'avab' is used in its literal sense to indicate the action of opening an object, in this case, the door.
Ta avab ukse.
He/She opens the door.
Here, 'avab' is used metaphorically to suggest that the book provides access or introduces one to the world of knowledge.
Raamat avab teadmiste maailma.
The book opens the world of knowledge.
In this example, 'avab' is used to describe the act of initiating or starting something, specifically starting a speech.