Usages of avisar
Ojalá el socorrista no tenga que avisarnos otra vez y podamos dar un chapuzón tranquilas antes de cenar.
I hope the lifeguard does not have to warn us again and that we can take a dip in peace before dinner.
Avísame si el suelo está resbaladizo.
Warn me if the floor is slippery.
El elenco entró, y eso que nadie avisó.
The theatrical cast entered, even though nobody warned us.
Elon.io is an online learning platform
We have an entire course teaching Spanish grammar and vocabulary.