This is the 582nd most frequent Slovenian word.
odločil
"Odločil" means "decided" in English.
In this sentence, 'odločil' is used in the past tense, third person singular, to indicate Peter's act of making a decision.
Peter se je odločil, da bo študiral medicino.
Peter decided to study medicine.
Here, 'odločila' is past tense, third person singular feminine, demonstrating an action of decision-making impacting an outcome.
Marija je v ključnem trenutku odločila o izidu igre.
Maria decided on the outcome of the game at a crucial moment.
In this question, 'odločil' is past simple tense, second person singular, used in a question about making a decision.