Russian ⇄ Abkhaz Afrikaans Bashkir Chinese Czech Danish Dutch English Esperanto Estonian Finnish French Georgian German Hungarian Italian Japanese Kalmyk Latvian Norwegian Bokmål Polish Portuguese Spanish Tajik Turkish Ukrainian Vietnamese

безжалостный adj. stresses
gen.	ruthless (Arashi); unrelenting; pitiless; relentless; remorseless; dispiteous; hard (hard discipline – суровая дисциплина); heartless; inexorable; merciless; unmerciful; barefisted; cold-blooded; ironfisted; steel-hearted; Draconic; grim; hard-hearted; implacable; inhuman; rigorous; unsparing; stony; bankrupt of compassion; brutal (Fiona); unforgiving (Notburga); unpitying (Mary-Maria); be as hard as nails (Valeron77); Draconian (grafleonov); cold blooded; hard eyed; hard hearted; steel hearted; harsh (в суждениях); strict (в суждениях); cruel; hard-eyed; dire; flint-hearted; inclement
Игорь Миг	no-holds-barred
amer.	cutthroat (cutthroat competition Val_Ships)
animat.	ferocious (I was imperiled by that ferocious, charging buck South_Park)
book.	despiteous; impiteous; insensible to pity
fig.	wall eyed
Makarov.	bareknuckle; devoid of pity
obs.	bowelless; flintheart; incompassionate; unbenevolent; unpitiful
uncom.	kindless; all-pitiless
безжалостно adv.
gen.	without remorse; cruelly; grimly; ruthlessly; relentlessly (Кунделев); remorselessly (Jan1970); unsparingly; unmercifully; hardheartedly; pitilessly; mercilessly
dipl.	inexorably
Makarov.	without mercy
obs.	inclemently; felly (in a fell manner; fiercely; ruthlessly collinsdictionary.com 'More); incompassionately; unpityingly; unpitifully
slang	fierce

безжалостный: 103 phrases in 15 subjects

American usage, not spelling	2
Business	2
Christianity	1
Ecology	1
Finances	1
French	1
General	52
Idiomatic	1
Informal	2
Makarov	29
Obsolete / dated	1
Politics	1
Religion	1
Rhetoric	7
Slang	1