riskless

certain clear dependable harmless healthy pure reliable secure

innocent sound

checked competent decontaminated innocuous innoxious inoffensive neutralized nonpoisonous nontoxic risk-free tame tried-and-true trustworthy uninjurious unpolluted wholesome

indefinite irresponsible uncertain undecided unfixed unreliable unsure

dangerous exposed harmful incautious poisonous risky unguarded unprotected unsafe unthoughtful vulnerable

protected

defended guarded sheltered shielded

immune impregnable out of harm's way unassailable undamaged unharmed

endangered insecure unprotected unsafe unsecure