This is the 1055th most frequent French word.
restera
"Restera" means "will stay" or "will remain."
The word 'restera' in this sentence is used in the sense of maintaining loyalty to one's principles over time into the future.
Il restera toujours fidèle à ses principes.
He will always remain faithful to his principles.
In this sentence, 'restera' is used to indicate the future tense of 'rester,' meaning that she will remain at home.
Elle restera chez elle ce week-end.
She will stay at home this weekend.
In this sentence, 'restera' is used to describe the state of the cake remaining fresh, owing to the specific conditions provided by the packaging.