un·mer·ci·ful 
(ŭn-mûrsĭ-fəl)
(ŭn-mûrsĭ-fəl)adj.
1. Having or exhibiting no mercy; merciless.
2. Exceeding a normal or reasonable limit; excessive: unmerciful heat.
un·merci·ful·ly adv.
un·merci·ful·ness n.
- upper class
- upper-class
- upperclassman
- upper crust
- upper-crust
- uppercut
- Upper Egypt
- upper GI series
- upper hand
- Upper Klamath Lake
- uppermost
- Upper Palatinate
- Upper Peninsula
- Upper Silesia
- Upper Sorbian
- Upper Tunguska
- Upper Volta
- Upper Volta
- Upper Voltan
- uppish
- uppishly
- uppitiness
- uppity
- uppityness
- Uppsala