This is the 257th most frequent French word.
sait
"Knows" (third person singular of "savoir").
Here, "sait" means 'knows how to', indicating knowledge or skill in performing an activity.
Elle sait jouer du piano.
She knows how to play the piano.
Here, "sait" means 'knows', signifying awareness or understanding of information.
Personne ne sait la vérité.
Nobody knows the truth.
Here, "sait" means 'knows', indicating recognition or acknowledgment of a fact.