spare no effort
Hold nothing back
To spare no effort is to do everything possible to achieve something, holding nothing back: They spared no effort in searching for survivors.
The phrase emphasizes maximum commitment—time, energy, resources, whatever it takes.
It appears most often in formal contexts: official statements, pledges, and promises of thorough action.
- exhaustiveCovering all possibilities
- striveMake sustained effort
- go all outCommit completely, withhold nothing
- wholeheartedFully and sincerely committed
- zealousPassionately eager and active
thorough · assiduous · go to great lengths · pull out all the stops · go the extra mile · diligent · put in the work · perseverance · bend over backwards · tenacity · willpower · leave no stone unturned · no holds barred · unstinting · grit · commitment · blood sweat and tears · intensive
- maximum effortall-out, full throttle, go all out, go hard, all in
- perseverancepersist, never give up, tenacity, hang in there, endurance
spare no efforthalf-hearted
Lacking sincerity or zeal
phone it in · slack off · coast · go through the motions · mail it in
spare no effortlazy
Avoiding effort or exertion
apathetic · indifferent · negligent · complacent · lackadaisical
spare, spares, spared, sparing, sparingly, spareness, effort, efforts, effortful