safe, secure

hazardous, dangerous, unsuitable, unsanitary, substandard, unacceptable, unfit, safe, unsound, unhygienic, inadequate, unhealthy, illegal, unusable, harmful, inappropriate, unstable, defective, unclean, insanitary, uneconomical, negligent, deplorable, risky, uninhabitable, intolerable, unsatisfactory, unseaworthy, unlivable, inhumane, unhealthful, invalid, irresponsible, improper, overcrowded, unsupervised, unethical, acceptable, undesirable, unliveable, inadvisable, unapproved, filthy, untenable, faulty, imprudent, unsalvageable, uneconomic, outdated, unreasonable, unnatural, unaffordable, noncompliant, incompliant, unfeasible, unsustainable, impassible, problematic, shoddy, unsecure, excessive, insufficient, impassable, unworkable, sanitary, uncomfortable, inoperative, unlawful, inaccessible, impractical, unenforceable, adulterated, immoral, unattractive, unwise, inoperable, inefficacious, unnecessary, reinspect, toxic, reckless, unregulated, obsolete, incorrect, unprofessional, unrepairable, detrimental, nonfunctional, inhabitable, inconvenient, unsalable, polluted, unsaleable, unwelcoming, deficient, undrinkable, unreliable, unconstitutional, unventilated, unconscionable, unlicensed, unadvisable, safer, safest, desirable, expensive, reprehensible, uncompetitive

condemnation, deathtrap, disrupted, evacuate

breakneck, chanceful, chancy, desperate, dicey, dodgy, embattled, insecure, insidious, on the hook, parlous, perilous, precarious, self-destructive, shaky, suicidal, touch-and-go, treacherous, uncertain, unguaranteed, unsecured, unsure, venturesome, venturous, vulnerable