“Excuse me. Do you know where the library is?” “I'm sorry. I'm a 'stranger' here myself.”
She is 'no stranger to' controversy. [=she has been involved in controversy before]
He is a 'stranger to' losing. [=he does not know what losing is like]
(..) Swear canst work in the ground so fast? Once more remove, good friends - Oh day and night, but this is wondrous strange - And therefore as a stranger give it welcome There are more things in heaven and earth, Horatio, than are dreamt of in our philosophy - But come, here as before, swear - Swear (..)2015 Hamlet