This is the 240th most frequent Polish word.
życiu
"Życiu" means "life" in the dative or locative case in Polish.
'Życiu' is utilized to denote a broader context or domain of life highlighted in the sentence.
Moje plany na przyszłość w życiu są bardzo klarowne.
My plans for the future in life are very clear.
In this context, 'życiu' indicates the domain or context where 'enjoyment' takes place.
Cieszę się każdą chwilą w życiu.
I enjoy every moment in life.
Here 'życiu' is used within the phrase 'W życiu', which translates to 'in life' or 'within one's lifetime', functioning as an adverbial complement.