This is the 615th most frequent Swedish word.
värsta
"Värsta" means "worst" in English.
In this sentence, 'värsta' acts as a superlative adjective, describing the noun 'stormen' in reference to its extreme characteristic.
Det var den värsta stormen jag någonsin har sett.
That was the worst storm I have ever seen.
'Värsta' used here as a determiner highlights a hypothetical extreme situation.
Jag är inte rädd för att möta värsta möjliga scenario.
I am not afraid to face the worst possible scenario.
'Värsta' here is used colloquially to intensify the description of 'duktiga personen,' functioning more as an adverbial modifier.