This is the 5790th most frequent German word.
brutalste
"Brutalste" means "most brutal" in English.
The word 'brutalste' here is used as a superlative adjective describing the noun 'Gewitter' (thunderstorm), meaning 'the most brutal'. It intensifies the severity of the experience.
Das war das brutalste Gewitter, das ich je erlebt habe.
That was the most brutal thunderstorm I have ever experienced.
In this context, 'brutalste' describes the noun 'Herausforderung' (challenge), highlighting it as being the most severe or demanding.
Er gab sich die größte Mühe und übertraf die brutalste Herausforderung.
He put in tremendous effort and surpassed the toughest challenge.
Here, 'brutalste' modifies 'Ehrlichkeit' (honesty), conveying a metaphorical sense of unfiltered or raw truthfulness.