unsafe

: unprotected
lacking protection or defense; dangerous
involving or causing danger or risk; liable to hurt or harm; precarious, shaky
not secure; beset with difficulties; unguaranteed, unsecured
without financial security; vulnerable
susceptible to attack

Antonyms:: secure
free from danger or risk; protected
kept safe or defended from danger or injury or loss; safe
free from danger or the risk of harm; assured
characterized by certainty or security; firm
securely established; fail-safe
guaranteed not to fail; sure
physically secure or dependable; invulnerable
immune to attack; impregnable; show more antonyms...

: breakneck
moving at very high speed; chanceful, chancy, dicey, dodgy
of uncertain outcome; especially fraught with risk; desperate
(of persons) dangerously reckless or violent as from urgency or despair; hazardous, risky, wild
involving risk or danger; insidious
intended to entrap; mordacious
biting or given to biting; on the hook
caught in a difficult or dangerous situation; parlous, perilous, precarious, touch-and-go
fraught with danger; self-destructive, suicidal
dangerous to yourself or your interests; treacherous, unreliable
dangerously unstable and unpredictable; insecure
lacking in security or safety; vulnerable
susceptible to attack

Antonyms:: safe
free from danger or the risk of harm; harmless
not causing or capable of causing harm; uninjured
not injured physically or mentally; fail-safe
eliminating danger by compensating automatically for a failure or malfunction; off the hook
freed from danger or blame or obligation; risk-free, riskless, unhazardous
thought to be devoid of risk; safe and sound, unhurt
free from danger or injury; secure
free from danger or risk; invulnerable
immune to attack; impregnable; show more antonyms...

DEFINITIONS OF: unsafe