non lasci

don't let; don't leave

→ non
phrase Uncommon #21,765
don't let; don't leave The meaning depends on what follows: it can mean not allowing something or someone to do something, or not leaving something in a particular state or place.
IT: Non lasci la porta aperta.
EN: Don't leave the door open.

Non lasci il motore acceso.

Don't leave the engine running.

Non lasci mai fare niente a nessuno.

You never let anyone do anything.

È meglio che non lasci Santiago.

It is better not to leave Santiago.

— Una donna fantastica (2017)

Non lasci entrare il cane.

Don’t let the dog in.

Non lasci la stanza.

Don't leave the room.

Non lasci vincere Tom.

Don't let Tom win.

Non lasci i libri della biblioteca qui.

Don't leave the library books here.

Non lasci libri qui.

Don't leave books here.

Assicurati che Mary non lasci la sua stanza.

Make sure Mary doesn’t leave her room.

Non lasci dormire Tom.

Don't let Tom sleep.

Non lasci la camera.

Don't leave the room.

Non lasci prove.

Don't leave any evidence.

Non lasci i libri della biblioteca in questa stanza.

Don't leave the library books in this room.

Non lasci le cose fatte a metà.

You don't leave things half-done.