Ruthless

Adjective

 * 1) Without pity or compassion; cruel, pitiless.
 * 2) * 1725, Alexander Pope et al. (translators), Homer (author), The Odyssey of Homer, Volume I, Bernard Lintot, page 10:
 * At length their rage the hoſtile Pow’rs reſtrain, / All but the ruthleſs Monarch of the Main.

Adverbs for Ruthless
atrociously; viciously; maliciously; vengefully; bitterly; cruelly; barbarously; brutally; ferociously; malevolently; venomously; outrageously; unbelievably; unimaginably; nefariously; wickedly; unutterably; strangely; unaccountably;  inherently;  terribly; shockingly; appallingly; astonishingly; horribly.

Thesaurus
Draconian, Tartarean, animal, anthropophagous, atrocious, barbaric, barbarous, beastly, bestial, bloodthirsty, bloody, bloody-minded, bowelless, brutal, brutalized, brute, brutish, callous, cannibalistic, cruel, cruel-hearted, demoniac, demoniacal, devilish, diabolic, dog-eat-dog, fell, feral, ferine, ferocious, fiendish, fiendlike, fierce, flinty, hard, harsh, heartless, hellish, implacable, inclement, inexorable, infernal, inhuman, inhumane, kill-crazy, malign, malignant, mean, merciless, mortal, murderous, noncivilized, pitiless, relentless, remorseless, sadistic, sanguinary, sanguineous, satanic, savage, severe, sharkish, slavering, subhuman, tameless, tough, truculent, unappeasable, unchristian, uncivilized, uncompassionate, uncompassioned, unfeeling, unflinching, unforgiving, ungentle, unhuman, unmerciful, unpitiful, unpitying, unrelenting, unremorseful, unsympathetic, unsympathizing, untamed, unyielding, vicious, wild, without mercy, wolfish

Translations

 * Chinese:
 * Mandarin: 殘忍, 残忍, ,
 * Czech:
 * Danish: skånselløs, skånselsløs
 * Dutch: onbarmhartig, medogenloos
 * Finnish:
 * French: impitoyable


 * German: ,
 * Macedonian: немилосрден, безмилосен
 * Norwegian: hensynsløs, ubarmhjertig
 * Polish: bezwzględny
 * Russian: безжалостный
 * Spanish: despiadado
 * Swedish: hänsynslös, skoningslös, obarmhärtig
 * Turkish: acımasız

Anagrams

 * hurtless, hustlers, sluthers