I returned it to him/her
Le devolví la bolsa a Ken.
I gave the bag back to Ken.
Le devolví a Tomás el dinero que le debía.
I returned to Tomás the money I owed him.
Siempre había sido amable conmigo, así que le devolví el favor.
He’d always been kind to me, so I returned the favor.
I gave him back his dictionary.
Le devolví el dinero a escondidas.
I secretly returned the money to him.
Me mordí la lengua y le devolví la sonrisa.
I bit my tongue and smiled back at him.
I gave him back the book.