unsafest
Maximally hazardous condition
The superlative form of unsafe—the least safe option among alternatives: That intersection is the unsafest in the county.
The form is grammatically correct but relatively uncommon; speakers often prefer "least safe" or "most dangerous" instead.
Likely to cause injury
- perilousFraught with danger
- treacherousDisloyal and dangerous
- deadlyAble to cause expiration
- lethalCausing or capable of death
fatal · life-threatening · precarious · risky · harmful · injurious · destructive · catastrophic
Without safeguard or shield
- unguardedWithout protection or caution
- unsecuredNot backed by collateral
- unshieldedLacking protective barrier
- defenselessWithout means to resist
exposed · susceptible · at-risk · endangered · imperiled · jeopardized · compromised · threatened
Carelessly ignoring danger
- foolhardyRecklessly bold
- irresponsibleLacking sense of duty
- carelessInattentive, prone to mistakes
- negligentFailing in due care
imprudent · incautious · unwise · heedless · rash · daredevil · thrill-seeking · risk-taking
hazardous
Likely to cause injury
- perilousFraught with danger
- treacherousDisloyal and dangerous
- deadlyAble to cause expiration
lethal · fatal · life-threatening · precarious · risky · harmful · injurious · destructive · catastrophic · disastrous
unprotected
Without safeguard or shield
- unguardedWithout protection or caution
- unsecuredNot backed by collateral
- unshieldedLacking protective barrier
defenseless · exposed · susceptible · at-risk · endangered · imperiled · jeopardized · compromised · threatened · insecure
reckless
Carelessly ignoring danger
- foolhardyRecklessly bold
- irresponsibleLacking sense of duty
- carelessInattentive, prone to mistakes
negligent · imprudent · incautious · unwise · heedless · rash · daredevil · thrill-seeking · risk-taking · gambling
contamination
Introduction of impurities
- exposureState of being unprotected
- toxicityCapacity to cause harm
- pollutionEnvironmental harm from waste
radiation · biohazard · asbestos · chemicals · lead · mercury · pesticide · carcinogen · spill · leakage
- unsafe sexIntercourse without contraception
- unsafe conditionsCircumstances posing danger