This is the 3209th most frequent Polish word.
silnym
The Polish word "silnym" means "strong" (instrumental or dative singular form of "silny").
The word 'silnym' is used as an adjective in instrumental case modifying 'człowiekiem' to describe a state of being strong.
W trudnych sytuacjach musisz być silnym człowiekiem.
In difficult situations, you need to be a strong person.
Here 'silnym' is used as an instrumental case complement describing the subject's state of being strong after an event.
Po treningu czuł się silnym i pełnym energii.
After the workout, he felt strong and full of energy.
In this sentence, 'silnym' modifies 'wiarą' in the instrumental case, emphasizing the strength of faith required to endure hardships.