Expresses the idea 'to the utmost', or 'to the extreme'.
Verb-ますstem + 極まる/極まりない, い-Adjective remove い + 極まる/極まりない,な-Adjective + 極まる/極まりない, Noun + 極まる/極まりない
Long explanation:
The ~極まる grammar point is remarking on the extreme nature of the situation or degree of a specific action or state. It is usually translated as 'to the utmost' or 'to the extreme'. This is typically used to express negative circumstances or conditions.