Translation of "make certain" into Spanish

I'll make certain you're granted the power to bring back your precious Kol.

Me aseguraré que tengas el poder para traer devuelta a tu preciado Kol.

This time, you thought you'd make certain of your target by poisoning Ruth's bottle of sloe gin.

Esta vez, lo que pensabas decirles asegurarse de su blanco envenenando botella de ginebra de endrinas de Ruth.

It should also make certain that her family members receive full and effective redress.

Deberá cerciorarse también de que los familiares reciban una reparación plena y efectiva.