extreme
n. countablen. the furthest possible point or degree of something. You use this when talking about two things that are as different as they can be, like freezing cold and boiling heat.
n. either of two things that are as different or as far apart as possible. Often used to describe contrasting behaviors, conditions, or opinions that represent the highest or lowest possible degrees.
The weather here moves from one extreme to another.
He often swings between the extremes of working all night and sleeping all day.
Political discourse in the region has increasingly moved toward the extremes, leaving little room for moderate voices to find common ground.
Borrowed into late Middle English from Old French extreme, from Latin extrēmus, the superlative of exter.
Commonly used in the plural form or in the phrase 'from one extreme to the other'.