This is the 47th most frequent French word.
moins
"Moins" means "less" or "minus" in English.
In this sentence, 'moins' is used to indicate a lesser quantity or number, in comparison to yesterday.
Il y a moins de monde ici qu'hier.
There are fewer people here than yesterday.
Here, 'moins' is used to indicate the minimum degree or the least of a certain quality among a set.
Regarde cette montre, c’est la moins chère du magasin.
Look at this watch, it's the least expensive one in the store.
In this example, 'moins' indicates a lower degree of a certain state or condition, in this case, the amount of stress.