To say ‘come back’ in Spanish, you would say ‘vuelve’. This is the command form of the verb ‘volver’, which means ‘to return’. It’s used when you want to ask someone to return to a place or situation.
For example, if you want to tell a friend to come back, you can say, ‘¡Vuelve, por favor!’ which means ‘Come back, please!’. If you are addressing someone formally, you might say ‘Vuelva, por favor!’. The verb can change slightly based on who you are speaking to and the level of formality you wish to convey.