This is the 5194th most frequent Polish word.
pt
"Pt" in Polish is an abbreviation for "piątek," meaning "Friday."
'Ptak' refers to a bird, a noun representing an animal.
Ptak śpiewa na drzewie.
The bird sings on the tree.
The word 'ptasi' is an adjective derived from 'ptak', describing something related to birds.
Ptasi chór rozlega się o poranku.
A bird choir resounds in the morning.
Here, 'ptaka' is the accusative form of the noun 'ptak', used after a verb indicating action towards the bird.