This is the 15643rd most frequent Polish word.
surową
The Polish word "surową" means "raw" or "strict" (feminine, accusative form), depending on context.
Here, "surową" is used as an adjective describing the nature of the punishment as being harsh or strict.
Otrzymała surową karę za swoje działania.
She received a harsh punishment for her actions.
In this sentence, "surową" modifies "marchewkę" to indicate the state of being uncooked or raw.
Lubię surową marchewkę jako zdrową przekąskę.
I like raw carrot as a healthy snack.
"Surową" in this case describes "postawę" as strict or stern in character.