extreme
noun
the furthest or highest degree of something
“he carried it to extremes”
the point located farthest from the middle of something
adjective
of the greatest possible degree or extent or intensity
“extreme cold”
“extreme caution”
far beyond a norm in quantity or amount or degree; to an utmost degree
“an extreme example”
“extreme temperatures”
beyond a norm in views or actions
“an extreme conservative”
“an extreme liberal”
most distant in any direction
“the extreme edge of town”
Source: WordNet 3.1, Princeton University