clean as a whistle

Without any blemish

Clean as a whistle means completely clean, pure, or free from fault.

The phrase emphasizes thoroughness—a surface wiped clean as a whistle, a record clean as a whistle, a getaway that leaves no trace.

The comparison likely refers to the clear, pure tone of a well-made whistle, though some connect it to the smooth surface of a whittled stick.

spotless

pristine

Pure and untouched

immaculateCompletely without blemish
gleamingReflecting light brightly
sparklingEmitting small bright flashes

polished · spick-and-span · scrubbed · sanitized · spotless · unblemished · untarnished · shiny · dustless · buffed

innocent

unblemished

Free from any defect

untaintedFree from contamination
blamelessFree of wrongdoing
guiltlessNot at fault

above-board · irreproachable · unsullied · unimpeachable · virtuous · wholesome · upstanding · honest · pure · faultless

clear

crisp

Firm and breakable

sharpFine-edged, or astute
pureUnmixed, without impurities
piercingPenetrating or very sharp

clarion · resonant · bright · distinct · ringing · true · high-pitched · shrill · penetrating · bell-like

Categories

cleanlinessdirty, neatness, wash up, filthy, tidiness
innocenceinnocent, innocence, purity, pure, blameless

Opposites

physical cleanliness

clean as a whistlefilthy

Thoroughly unclean

grimy · dirty · grubby · soiled · mucky

moral/ethical purity

clean as a whistledirty

Not clean

corrupt · crooked · suspect · shady · tainted

clarity/precision

clean as a whistlesloppy

Careless and untidy

half-done · messy · haphazard · botched · careless

Family

clean, whistle, cleaner, cleaned, unclean, cleanliness, cleans, cleansing, cleanser

Familiarity: Top 50,000
Profile: Known to kids · Used worldwide · Timeless · Positive · Everyday, not technical · Rated G