Idiom Definition:
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"to give no quarter"
to be very strict in enforcing one's beliefs
to exert one's superiority in a situation by not giving anything to anyone
Synonyms:
callous, cold, cold-blooded, cruel, hard, harsh, heartless, indifferent, insensitive, mean, nasty, pitilessness, tough, uncompassionate, unfeeling, unkind, unpitying, unsympathetic, unyielding