merciless

Mane (Îngilîzî)

Showing no mercy; cruel and pitiless.

Têgeh

bêrehm

zalim

Hevwate

cruel

pitiless

ruthless

heartless

brutal

hard-hearted

unmerciful

savage

unfeeling

fierce

unkind

harsh

uncompassionate

relentless

atrocious

grim

unrelenting

vicious

wicked

implacable

inhuman

cold-hearted

barbarous

inexorable

incisive

barbarian

hard

callous

bloodthirsty

cruel and heartless

unsparing

cold-blooded

evil-minded

unsympathetic

remorseless

gangsterlike

black-hearted

evil

ferocious

hard-line

inclement

intransigent

iron

malicious

obdurate

oppressive

sadistic

selfish

stony-hearted

stouthearted

Werger

impitoyable

despiadado

gnadenlos

erbarmungslos

unbarmherzig

crudele

spietato

amansız

onbarmhartig

merhametsiz

cruel

grausam

acımasız

cruel

Wekî (IPA) tê bilêvkirin

/ˈmɜːsɪləs/

Etîmolojî (Îngilîzî)

Ji Middle English mîras hatiye girtin: merciles

In summary

From Middle English merciles, mercyles, equivalent to mercy + -less.