This is the 10984th most frequent German word.
schlimmer
"Worse."
The word 'schlimmer' in this sentence is used as a comparative adjective, describing the increasing negativity of the weather's condition.
Das Wetter wird immer schlimmer.
The weather is getting worse and worse.
In this sentence, 'schlimmeres' is a comparative form used to describe the relative severity of the problem compared to expectations.
Sie hat ein schlimmeres Problem als erwartet.
She has a worse problem than expected.
Here, 'Schlimmeres' is used as a nominalized adjective referring to a hypothetical situation worse than what has currently occurred.