merciless

mer·ci·less  (mûrs-ls)

adj.

Having no mercy; cruel.

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merci·less·ly adv.

merci·less·ness n.

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merciless [ˈmɜːsɪlɪs]

adj

without mercy; pitiless, cruel, or heartless

mercilessly  adv

mercilessness  n

Thesaurus

Adj.

1.

merciless - having or showing no mercy; "the merciless enemy"; "a merciless critic"; "gave him a merciless beating" unmerciful bloody - having or covered with or accompanied by blood; "a bloody nose"; "your scarf is all bloody"; "the effects will be violent and probably bloody"; "a bloody fight" inclement - used of persons or behavior; showing no clemency or mercy; "the harsh sentence of an inclement judge" uncompassionate - lacking compassion or feeling for others; "nor silver-shedding tears could penetrate her uncompassionate sire"- Shakespeare hard - dispassionate; "took a hard look"; "a hard bargainer"; unkind - lacking kindness; "a thoughtless and unkind remark"; "the unkindest cut of all" implacable - incapable of being placated; "an implacable enemy" merciful - showing or giving mercy; "sought merciful treatment for the captives"; "a merciful god"

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merciless

adjective cruel, ruthless, hard, severe, harsh, relentless, callous, heartless, unforgiving, fell (archaic), inexorable, implacable, unsympathetic, inhumane, barbarous, pitiless, unfeeling, unsparing, hard-hearted, unmerciful, unappeasable, unpitying the merciless efficiency of a modern police state

Translations

merciless [ˈmɜːsɪlɪs] ADJ [person, attack] → despiadado, cruel; [killing, beating] → cruel; [sun, heat] → implacable
he's famous for his merciless treatment of hecklers → tiene fama de tratar despiadadamente a los que interrumpen con preguntas o comentarios molestos

merciless [ˈmɜː^rsɪləs] adj

[person] → impitoyable, sans pitié

[efficiency, scrutiny, logic] → implacable, impitoyable
the merciless efficiency of a modern police state → l'implacable efficacité d'un État policier moderne, l'impitoyable efficacité d'un État policier moderne

merciless

adj → unbarmherzig, erbarmungslos; destruction → schonungslos; (= unrelenting) treatment, scrutiny, competition, glare, sun → gnadenlos

merciless [ˈmɜːsɪlɪs] adj → spietato/a