Translation:I trust her
I share some sentences with the verb "kuamini" in the link below (prepositional verb "ninamwamini"):
Illustration: Perhaps you have a friend of whom you would say: ‘I trust that man.
Mfano: Labda una rafiki ambaye unaweza kusema hivi kumhusu: ‘Ninamwamini mtu yule.
Yes, it could, if you are talking about putting your trust in someone, or about faith in religion. I'm not sure when it comes to information that someone is telling, that you believe the words they are saying.
But where is the 3rd person here? I mean, how wouldn't it be also "i trust you" ninamwamini?