[tamcap]

https://en.wiktionary.org/wiki/avis#Old_French Wiktionary says it comes from Latin.

In English "advise", alas, not used in the common language in regards to mail, like it is used in Polish (and Czech?).

[tecleandor]

In Spanish 'aviso' would be 'notice' or 'warning'. Italian 'avviso' is kind of similar.