Extreme

末端の

mattan no

(of a place, the most remote, farthest or outermost)

極度の

kyokudo no

(in the greatest or highest degree; intense)

極端な

kyokutan na

(excessive, or far beyond the norm)

究極の

kyūkyoku no

(archaic: ultimate, final or last)

極端

kyokutan

(each of the things at opposite ends of a range or scale)

極限

kyokugen

(greatest or utmost point, degree or condition)

究極

kyūkyoku

(greatest or utmost point, degree or condition)