This is the 103rd most frequent Italian word.
con
"Con" means "with" in English.
The word 'con' indicates accompaniment, showing that the speaker is going to the park alongside their brother.
Vado al parco con mio fratello.
I go to the park with my brother.
Here, 'con' expresses inclusion, specifying that the tea should include lemon as an ingredient.
Voglio un tè con limone, per favore.
I would like a tea with lemon, please.
In this sentence, 'con' provides a manner or mode detail, describing that the action was performed carefully using 'great care' as the means.