took no prisoners

Spared no one

Took no prisoners describes acting with ruthless determination, showing no mercy or restraint.

From military contexts where capturing enemies alive wasn't an option—or wasn't offered.

Now applied to anyone who pursues goals aggressively without concern for others' feelings or welfare: Her cross-examination took no prisoners.

The phrase often carries grudging admiration for uncompromising effectiveness.

Related

uncompromising · cutthroat · no-holds-barred · bare knuckle · merciless · no mercy · aggressive · went for the jugular · zero-sum · winner take all · fierce · high-stakes · savage · brutal · scorched earth · unyielding · all-or-nothing · confrontational

Opposites
mercy and leniency

took no prisonerspardoned

Formally forgiven for offense

let off the hook · spared · cut some slack · forgave and forgot

intensity of approach

took no prisonerssoft-pedaled

Diminished in emphasis

handled with kid gloves · backed off · held back · trod lightly · kid-gloved

thoroughness and completeness

took no prisonersheld back

Kept from advancing

pulled back · mailed it in · coasted

Family

took, taker, takers, retook, undertakes, undertook, prisoner, prisoners, prison

Familiarity
Top 200,000
Profile
Used worldwide · Timeless · Negative · Everyday, not technical · Rated PG