Immune to damage or effect.
Unaffected or unable to be affected by something.
Preventive of any penetration; impenetrable, impermeable, particularly of water.
Which is not affected or overcome by a disease, drug, chemical or atmospheric agent, extreme of temperature, etc.
Which makes resistance or offers opposition.
Not greatly influenced by individual members of a sample.
A person who resists; especially a member of a resistance movement.
A thing which resists.