This is the 2955th most frequent Polish word.
normalnym
The Polish word "normalnym" means "normal" or "ordinary" in English, used in the instrumental or dative case.
Here, "normalnym" is the instrumental case of adjective "normalny" in singular masculine form, agreeing with "człowiekiem" in the sentence.
Zachować spokój w trudnej sytuacji to znak, że jesteś normalnym człowiekiem.
Keeping calm in a difficult situation is a sign that you are a normal person.
In this sentence, "normalnym" is used as an adjective agreeing in instrumental singular form with "nawykiem".
Podczas pandemii, mycie rąk stało się normalnym nawykiem.
During the pandemic, washing hands became a normal habit.
Here, "normalnym" serves as an adjective describing "zachowaniem" in instrumental singular form.