This is the 2280th most frequent French word.
jouait
"Jouait" means "was playing" or "played" (imperfect tense of "jouer").
In this sentence, 'jouait' is used in the imperfect tense to describe a habitual action in the past.
Il jouait du piano chaque soir.
He played the piano every night.
Here, 'jouait' is used to indicate an ongoing action in the past that was happening when another event (arrival) occurred.
Quand je suis arrivé, il jouait dans la cour.
When I arrived, he was playing in the yard.
The word 'jouait' in this context is used in the past imperfect tense to describe a repeated or habitual action from childhood.