This is the 11192nd most frequent Russian word.
грозой
The Russian word "грозой" means "thunderstorm" or "by/with a thunderstorm" in English (instrumental case of "гроза").
Here, 'грозой' refers to a natural phenomenon, specifically a thunderstorm.
На горизонте показалась туча с грозой.
A cloud with a thunderstorm appeared on the horizon.
In this sentence, 'грозой' is used metaphorically to describe someone's powerful and forceful leadership style.
Он управляет этой командой как грозой.
He leads this team like a thunderstorm.
Here, 'грозой' metaphorically describes someone as a terror or a strong adversary, emphasizing dominance and influence.