This is the 4812th most frequent French word.
relâche
"Relâche" means "rest," "break," or "intermission" in English.
In this sentence, 'relâche' refers to a break or pause in activity, specifically indicating a day off for theater performances.
Le théâtre est fermé aujourd'hui car c'est jour de relâche.
The theater is closed today because it is a day off.
Here, 'relâche' signifies relaxation or easing off from strictness or intense effort.
Son travail est rigoureux, mais il laisse parfois un peu de relâche.
His work is rigorous, but he sometimes gives it a bit of slack.
Although not directly using 'relâche,' the verb 'relâcher' derived from it means to release from captivity or confinement.