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Business & finance
Glyph
Font Awesome
warning
Black
512x512
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Signs & symbols
Buttons
warning, Alert, danger
Goldenrod
Burn, Alert, warning
security, protect, warning
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UI navigation
warn, danger, warning
Crimson
Mixed
Basic icon element
danger, warning, safety
Free Misc Icon Set 2
Error, sign, fill
Error, Alarm, warning
Simple Geometric Icons
Exit, delete, Close
Locations - Solid
training, ride, Bikes
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Simple darkcon
warning, Error, skull
324x512
problem, warning, Caution
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UI
Blogger
DarkSlateGray
41x41
Icons prohibition
prohibition sign, warning, impossible
prohibition sign, prevention, prohibiting sign
impossible, prohibition, prohibiting sign
roller skates, prohibition, impossible
prohibition, prevention, Cigarette
prohibiting sign, interdiction, prohibition
prohibiting sign, prohibition sign, impossible
impossible, prohibition sign, prevention
Bicycle, interdiction, prevention
prohibition sign, impossible, prohibition
Google Material Design icons