What does aise mean at the end of sauce names like mayonnaise bearnaise and hollandaise?

"Aise" is not a word used in the names of sauces like mayonnaise, béarnaise, and hollandaise. These are classic sauces with French origins, and "aise" is not a French suffix or term related to food preparation.

The names of these sauces are simply French words:

* Mayonnaise: Derived from the city of Mahón in Minorca, Spain, where it was first made.

* Béarnaise: Named after the Béarn region in southwestern France.

* Hollandaise: Named after the Netherlands (Holland in English), as it was originally thought to have originated there.

It's possible you might be thinking of a different word or phrase, or you may have misheard or misread the name. If you can provide more context or the full name, I might be able to help you further.