willfully or knowingly causing pain or distress to others.

enjoying the pain or distress of others

the cruel spectators of the gladiatorial contests.

causing or marked by great pain or distress

a cruel remark; a cruel affliction.

rigid; stern; strict; unrelentingly severe.

adjective

charitable , compassionate , considerate , feeling , gentle , kind , merciful , sympathetic , thoughtful , uncruel

adjective

atrocious , barbarous , bestial , bitter , bloodthirsty , brutal , brutish , callous , cold-blooded , degenerate , demoniac , depraved , evil , excruciating , ferocious , fierce , flinty , hard , hard-hearted , harsh , hateful , heartless , hellish , implacable , inexorable , inhuman , inhumane , malevolent , merciless , monstrous , painful , pernicious , poignant , rancorous , relentless , revengeful , ruthless , sadistic , sinful , spiteful , tyrannical , unfeeling , unkind , unnatural , unrelenting , vengeful , vicious , virulent , wicked , fell , feral , savage , truculent , wolfish , barbaric , bloody , despiteful , diabolical , dispiteous , draconian , fiendish , hardhearted , incompassionate , indurate , insensitive , iron , lupine , malicious , marblehearted , mean , perverted , pitiless , remorseless , satanic , severe , tyrannous , unjust , unmerciful