Rester means "to stay". It is an extremely common verb.
Example sentences with rester
Je reste à la maison — I'm staying at home
Tu comptes rester chez tes grands-parents? — Are you planning to stay with your grandparents?
Nous allons rester en forme cet hiver en faisant du yoga — We will stay in shape this winter by doing yoga.
Tu restes là-bas combien de temps? — How long will you stay there?
Nous restons vigilants tant que COVID reste répandu dans notre ville — We remain vigilant as long as COVID remains prevalent in our city.
Vous restez longtemps ici? — Are you staying here for a long time?
Ma soeur est restée à Paris pendant deux semaines — My sister stayed in Paris for 2 weeks
Etymology
Rester comes from the latin verb restare, which means to remain, to stay.
Expressions with rester
rester en forme — to stay in shape. (Common expression)
rester dans l’ombre — to be discreet; not show oneself. Literally "to stay in the shadows".
rester sur sa faim — to be disappointed, to be unsatisfied, left wanting more. Literally "to stay on his/her/my ect. hunger". (This is a more advanced expression)