knew
Maria fut enchantée quand elle sut les résultats des élections.
Maria was delighted when she heard the election results.
Personne ne le sut.
Nobody knew.
D'un seul regard il sut que l'enfant avait faim.
With a single glance, he knew that the child was hungry.
Tellement la question était difficile que nul ne sut répondre.
The question was so difficult that no one could answer it.