Te lo aseguro= = asegúrotelo?
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3 Answers
Yes, it's correct, but, I think "asegúrotelo" it's old fashioned. At least, we don't use it in Spain (perhaps in literary language...).
In a lot of older literature, like Cervantes for example, pronouns are often attached like this.
What exactly does that mean? (The second part, that is)... I understand "Te lo aseguro", but not "asegúrotelo". It looks similiar to command form but who is doing the "commanding" and to whom? By any chance, would you mean "asegúratelo" (which would be different from "te lo aseguro")? If not, then yep, I'm definitely confused.