warning sign
Omen of trouble
A warning sign is an indicator that something is wrong or may go wrong.
Traffic warning signs alert drivers to hazards ahead.
In medicine, warning signs are symptoms suggesting serious illness: Chest pain is a warning sign of heart attack.
Figuratively, any troubling early indicator qualifies: His temper was a warning sign she ignored.
One who foreshadows
- red flagIndicator of danger
- portentSign of future calamity
- forebodingFearful anticipation of harm
- premonitionAdvance sense of future events
foreshadowing · handwriting on the wall · ill omen · telltale · precursor · dark cloud · storm brewing · tip of iceberg
Indicator of danger
- symptomIndicator of disease
- indicatorSign revealing status
- cueTrigger for action
- patternRecurring arrangement or template
trigger · escalation · boundary violation · gut feeling · intuition · body language · tone shift · inconsistency
Removal from danger
- fire exitDesignated escape route
- emergency exitUrgent departure route
- 911Crisis response number
- first respondersPersonnel arriving at emergencies initially
shelter · assembly point · alarm · siren · flashing light · rescue · lifeguard · first aid
Produce or relinquish
- crosswalkMarked street-crossing zone
- pedestrianOne traveling afoot
- detourAlternate path around obstruction
- no entryAccess not permitted
dead end · curve ahead · school zone · railroad crossing · speed limit · merge · one way · road work
Capable of causing harm
- flammableProne to ignition
- radioactiveEmitting nuclear decay particles
- biohazardDangerous living organism risk
- corrosiveDestroys by chemical action
explosive · poison · high voltage · electrical · venomous · wet floor · slippery · falling rocks
Protective headgear for worksites
- safety gogglesEye shields for hazards
- ear protectionDevices shielding against noise
- high-visibilityEasily seen from distance
- reflectiveCasting back light
guardrail · barricade · caution tape · protective equipment · smoke detector · fire extinguisher · life preserver · safety belt
Skeletal danger symbol
- allergenImmune response trigger
- choking hazardItem risking airway blockage
- contraindicationReason to avoid treatment
- side effectUnintended secondary outcome
drug interaction · overdose · keep out of reach · latex allergy
harbinger
One who foreshadows
- red flagIndicator of danger
- portentSign of future calamity
- forebodingFearful anticipation of harm
premonition · foreshadowing · handwriting on the wall · ill omen · telltale · precursor · dark cloud · storm brewing · tip of iceberg
red flag
Indicator of danger
pattern · trigger · escalation · boundary violation · gut feeling · intuition · body language · tone shift · inconsistency · evasiveness
evacuation
Removal from danger
- fire exitDesignated escape route
- emergency exitUrgent departure route
- 911Crisis response number
first responders · shelter · assembly point · alarm · siren · flashing light · rescue · lifeguard · first aid · defibrillator
yield
Produce or relinquish
- crosswalkMarked street-crossing zone
- pedestrianOne traveling afoot
- detourAlternate path around obstruction
no entry · dead end · curve ahead · school zone · railroad crossing · speed limit · merge · one way · road work · construction zone
toxic
Capable of causing harm
- flammableProne to ignition
- radioactiveEmitting nuclear decay particles
- biohazardDangerous living organism risk
corrosive · explosive · poison · high voltage · electrical · venomous · wet floor · slippery · falling rocks · thin ice
hard hat
Protective headgear for worksites
- safety gogglesEye shields for hazards
- ear protectionDevices shielding against noise
- high-visibilityEasily seen from distance
reflective · guardrail · barricade · caution tape · protective equipment · smoke detector · fire extinguisher · life preserver · safety belt · airbag
skull and crossbones
Skeletal danger symbol
- allergenImmune response trigger
- choking hazardItem risking airway blockage
- contraindicationReason to avoid treatment
side effect · drug interaction · overdose · keep out of reach · latex allergy
- Road Safetyseatbelt, speed limit, crosswalk, traffic light, pedestrian crossing
- deterrentsguard dog, security camera, penalty, padlock, pepper spray
- lifeguardinglifeguard, lifeguard stand, rescue tube, rescue buoy, CPR
- road signsstop, do not enter, no entry, no left turn, yield
- safety alertsfire alarm, smoke alarm, smoke detector, emergency alert, alert tone
- safety measureshandwashing, backup plan, fire prevention, fire drills, escape route
warning signall-clear
Signal danger has passed
green light · all clear signal · welcome sign · thumbs up · reassurance
warning signreassurance
Words meant to calm
clean bill of health · seal of approval · stamp of approval · good omen
warning signgood sign
good omen · silver lining · ray of hope · bright spot · turning point
sign, warn, warning, signal, signs, warned, warns, warnings, signaling