immune, resistant -- (relating to or conferring immunity (to disease or infection))
tolerant, resistant -- (able to tolerate environmental conditions or physiological stress; "the plant is tolerant of saltwater"; "these fish are quite tolerant as long as extremes of pH are avoided"; "the new hybrid is more resistant to drought")
resistant -- (impervious to being affected; "resistant to the effects of heat"; "resistant to persuasion")
insubordinate, resistant, resistive -- (disposed to or engaged in defiance of established authority)
repellent, resistant -- (incapable of absorbing or mixing with; "a water-repellent fabric"; "plastic highly resistant to steam and water")