psem

In a sentence

• Często spaceruję z moim psem.

  I often walk with my dog.

  Here, 'psem' is the instrumental form of 'pies' used to indicate 'with my dog.'

• Wczoraj znowu bawiłem się z psem sąsiada.

  Yesterday, I once again played with the neighbor's dog.

  In this sentence, 'psem' is similarly the instrumental case expressing 'with the dog of the neighbor.'

• Nie mogłem uwierzyć, że ktoś znalazł ten kamień psem.

  I couldn't believe that someone found this stone with the dog.

  Here, 'psem' in its instrumental form denotes the means or tool used, indicating 'with the help of the dog.'