This is the 4169th most frequent Polish word.
chlebem
"Chlebem" is the instrumental case of "chleb," meaning "with bread" in English.
The word 'chlebem' is the instrumental case of 'chleb' (bread), showing means or accompaniment (sharing the bread).
Dzielimy się chlebem w dzień świąteczny.
We share bread on the holiday.
Here 'chlebem' is used as an instrument for feeding the birds, indicating the material used in the action.
Karmię ptaki chlebem w parku.
I feed the birds with bread in the park.
'Chlebem' metaphorically refers to livelihood in this context, showing its figurative usage.