This is the 3836th most frequent Catalan word.
avisar
To warn or to inform.
In this sentence, 'avisar' means to warn someone about a danger or risk, conveying the message to take precaution.
Em va avisar del perill de travessar el riu.
He warned me of the danger of crossing the river.
Here, 'avisar' is used in the sense of notifying or informing someone upon the occurrence of a specified event.
Si us plau, avisa'm quan arribis a casa.
Please let me know when you arrive home.
In this instance, 'avisar' is used in the sense of informing or calling attention to an event or gathering by notifying others.