General "within":
* à l'intérieur de: This is the most common and literal translation, meaning "inside of."
* en: This is a more general translation, meaning "in" or "within."
* dans: This is also a general translation, meaning "in" or "within," but it is often used for time or space.
Specific examples:
* Within a week: Dans une semaine
* Within the house: À l'intérieur de la maison
* Within the city: Dans la ville
* Within reach: À portée de main
The best translation will depend on the specific context of your sentence.