This is the 34th most frequent Polish word.
ten
The Polish word "ten" means "this" or "that" (masculine singular form).
The word 'ten' is used here as a masculine, singular, nominative demonstrative pronoun to indicate a specific object ('house') being referred to.
Ten dom jest bardzo duży.
This house is very large.
The word 'ten' serves as a masculine, singular, accusative demonstrative pronoun referring to the specific car being object of the action (buying).
Chciałbym kupić ten samochód.
I would like to buy this car.
The word 'ten' is used in this context as a masculine, singular, nominative demonstrative pronoun identifying a specific individual ('boy').