This is the 377th most frequent Lithuanian word.
leisti
"Leisti" means "to allow" or "to let."
In this sentence, "leisti" is used in the sense of 'spend.' It describes how children choose to spend their leisure time.
Vaikai mėgsta leisti sekmadienius parke.
Children like to spend Sundays in the park.
Here, the verb "leisti" is used to mean 'allow' or 'permit.' It demonstrates permission given by someone, in this case, the parents.
Tėvai leidžia vaikams žaisti kieme.
Parents allow the children to play in the yard.
In this context, "leisti" signals granting permission, specifically by an authority like a doctor, for someone to resume an activity.