This is the 13392nd most frequent Polish word.
ołów
"Lead" (the metal).
The word 'ołów' is used literally to signify 'lead,' the chemical element.
Ołówek zawiera grafit zamiast ołowiu.
The pencil contains graphite instead of lead.
Here 'ołów' refers to lead as a material used in crafting objects.
Stary zegar miał obudowę splecioną z ołowiu.
The old clock had a casing interwoven with lead.
In this sentence, 'ołów' is used metaphorically to convey heaviness and burden.