Those images themselves should debunk the myths that Islam and Muslims are extreme.
They were so absorbed by the experience that they hardly noticed the extreme heat and difficult conditions.
Phelps approach to sharing “good news” was always dogmatic, extreme, and seemingly void of humanity.
early 15c., from Old French extreme (13c.), from Latin extremus "outermost, utmost, farthest, last," superlative of exterus (see exterior).
In English as in Latin, not always felt as a superlative, hence more extreme, most extreme (which were condemned by Johnson). The noun is first recorded 1540s, originally of the end of life, cf. Latin in extremis. Extreme unction preserves the sense of "last, latest" (15c.). Extremes "opposite ends of anything" is from 1550s.