ruthless
adjective
[ ˈruːθləs ]
• having or showing no pity or compassion for others.
• "a ruthless manipulator"
Similar:
merciless,
pitiless,
cruel,
heartless,
hard-hearted,
hard,
stony-hearted,
stony,
with a heart of stone,
cold-blooded,
cold-hearted,
harsh,
callous,
severe,
unmerciful,
unrelenting,
unsparing,
unforgiving,
unfeeling,
uncaring,
unsympathetic,
uncharitable,
lacking compassion,
relentless,
remorseless,
unbending,
inflexible,
inexorable,
implacable,
unpitying,
unremitting,
steely,
brutal,
inhuman,
inhumane,
barbarous,
barbaric,
savage,
bloodthirsty,
sadistic,
vicious,
fierce,
ferocious,
cut-throat,
dog-eat-dog,
inclement,
fell,
marble-hearted,
Origin:
Middle English: from ruth + -less.