This is the 1911th most frequent Polish word.
stal
Steel.
Here, 'stal' is a noun referring to the metal steel.
Stal jest materiałem wykorzystywanym w budownictwie.
Steel is a material used in construction.
Here, 'stal' is used metaphorically as a noun to describe a quality of determination and strength.
Jego charakter stal był nieugięty w obliczu trudności.
His steel character was unyielding in the face of difficulties.
Here, 'stal' is a verb form (past tense of 'stać') meaning 'stood,' which is a completely different meaning from the previous uses.