WordWeb Online

1. Relating to or conferring immunity (to disease or infection)
   - immune
    
2. Able to tolerate environmental conditions or physiological stress
   "the new hybrid is more resistant to drought"
   - tolerant
    
3. Impervious to being affected
   "resistant to the effects of heat"; "resistant to persuasion"
    
4. Disposed to or engaged in defiance of established authority
   - insubordinate, resistive
    
5. Incapable of absorbing or mixing with
   "plastic highly resistant to steam and water"
   - repellent

See also: defiant, imperviable, impervious, insusceptible, nonabsorbent, nonabsorptive, noncompliant, resist, resistance, tolerable, unsusceptible