You can differentiate the cases by the conjugation of the object though. "nain Annan" (genetive, "all of") is marrying Anna, while "nain Annaa" (partitive, "p

You can differentiate the cases by the conjugation of the object though. "nain Annan" (genetive, "all of") is marrying Anna, while "nain Annaa" (partitive, "part of") is fucking Anna. But yes, learners of Finnish should definitely be careful with that verb ;)