This is the 5423rd most frequent Polish word.
symbolu
"Symbolu" is the genitive singular form of "symbol," meaning "of a symbol" in English.
Here, the word 'symbolu' is in the genitive case, associated with the descriptor 'tego' (this). It indicates possession or relation to 'symbol', meaning 'of the symbol'.
Znaczenie tego symbolu jest bardzo głębokie.
The meaning of this symbol is very profound.
Here, 'symbolu' is in the genitive case again, referring to 'our team's symbol' and indicating the relationship.
Przypominam sobie kolory symbolu naszej drużyny.
I recall the colors of the symbol of our team.
In this sentence, 'symbolu' also takes the genitive case, describing association to 'national' and 'creator'.