tú devuélvele

return it to him/her

→ devolver
devuélv give back; return + e informal singular command (tú) + le Indirect object pronoun: to him, her, or you
verb · 2nd-person singular informal Rare #54,124
return it to him/her The attached pronoun le can also mean “to you” formally.
SP: Devuélvele las llaves mañana.
EN: Return the keys to him tomorrow.
Conjugation of devolver

Devuélvele el libro a su propietario.

Return the book to its owner.

Devuélvele el reloj al señor Prieto.

Give the watch back to Mr. Prieto.

— Durante la tormenta (2018)

Devuélvele este libro.

Give this book back to him.

Devuélvele el dinero inmediatamente.

Give him his money back immediately.