This is the 554th most frequent Serbian word.
остао
"Остао" means "remained" or "stayed" in English.
The word 'остао' is used to indicate remaining, emphasizing the state of staying at the home.
Он је остао код куће јер је падала киша.
He stayed home because it was raining.
Here 'остао' brings out the notion of ending in a certain state, highlighting the transition to being unemployed.
После дужег времена, остао је без посла.
After a long time, he ended up without a job.
In this context, 'остао' conveys the persistence of a condition, referring to the air staying fresh.