In Spanish, ‘Be careful’ is translated as ‘Ten cuidado’. This phrase is commonly used to warn someone to be cautious or to pay attention to potential dangers.
For example, if you see someone about to step on a slippery surface, you might say, ‘Ten cuidado, el piso está resbaloso’ which means ‘Be careful, the floor is slippery.’
It’s a straightforward and useful expression to know, especially when traveling or interacting with Spanish speakers.