extreme
Pronunciation: /ɪkˈstriːm, ɛk-/
adjective
- 1reaching a high or the highest degree; very great: extreme cold
- not usual; exceptional: in extreme cases the soldier may be discharged
- very severe or serious: expulsion is an extreme sanction
- (of a person or their opinions) far from moderate, especially politically: groups of his more extreme supporters rioted in front of parliament
- denoting or relating to a sport performed in a hazardous environment and involving great risk, such as white-water rafting: extreme sports like snowboarding
noun
- 1either of two abstract things that are as different from each other as possible: we represented opposite extremes of college society—he a member of the Old Guard, I one of the radicals
- the highest or most extreme degree of something: extremes of temperature
- a very severe or serious measure: the extreme of applying for poor relief

Phrases
-
extremes meet
- proverb opposite extremes have much in common.
-
go (or take something) to extremes
- take an extreme course of action; do something to an extreme degree: they took a commendable anti-ageist policy to extremes
-
in the extreme
- to an extreme degree: the reasoning was convoluted in the extreme

Origin:
late Middle English: via Old French from Latin extremus 'outermost, utmost', superlative of exterus 'outer'

Spelling help
Remember that the ending of extreme is spelled -eme.