This is the 39th most frequent Slovenian word.
če
"If"
In this sentence, 'če' is used as a conditional clause introducing the condition for the outcome described in the main clause.
Če se boš učil, boš uspešen.
If you study, you will be successful.
Here, 'če' functions as a conjunction introducing an indirect yes-or-no question.
Vprašal me je, če vem, kje je ključe.
He asked me if I know where the keys are.
In this case, 'če' is part of the word 'čeprav', forming a concessive conjunction indicating a contrast.