dwulatkiem

In a sentence

• Mój syn jest teraz dwulatkiem.

  My son is now a two-year-old.

  Here, 'dwulatkiem' is used as a noun referring to a child who is two years old.

• Widzę, że dobrze sobie radzisz z opieką nad dwulatkiem.

  I see that you are doing well taking care of a two-year-old.

  In this sentence, 'dwulatkiem' is used in the instrumental case, following the preposition 'nad,' which governs this case.

• Każdy dwulatek potrzebuje dużo uwagi.

  Every two-year-old requires a lot of attention.

  Here, 'dwulatek' is used in the nominative case to refer generally to a child who is two years old.