This is the 380th most frequent Slovenian word.
glavni
"Main" or "chief."
In this sentence, 'glavni' is used as an adjective describing the noun 'razlog', meaning 'main' or 'chief'.
To je glavni razlog za našo odločitev.
This is the main reason for our decision.
Here, 'glavni' describes the noun 'inštruktor', indicating the person's primary or leader role.
On je glavni inštruktor tečaja.
He is the main instructor of the course.
In this sentence, 'glavnega' is the genitive singular form of 'glavni', modifying 'proračun' to specify its significant status in the context.