This is the 3557th most frequent Swedish word.
extrem
Extreme.
The word 'extrem' (here used as 'extremt', the neuter form) functions as an adverb modifying 'kallt' (cold), emphasizing the severity of the cold weather.
Vädret har varit extremt kallt den här vintern.
The weather has been extremely cold this winter.
The word 'extrem' is used as an adjective describing 'sportfantast', implying someone who engages passionately in sports that demand exceptional bravery or skill.
Han är en extrem sportfantast, alltid redo för nya utmaningar.
He is an extreme sports enthusiast, always ready for new challenges.
Here, 'extremt' (neuter singular form of 'extrem') is used as an adjective modifying 'steg' (step), signifying the boldness or intensity of the action mentioned.