RESISTANT

adj. 1 opposed, against, defiant, averse, unsubmissive; impervious, unaffected The organisms are resistant to any change 2 recalcitrant, stubborn, obstinate, intransigent, rebellious, immovable, intractable, refractory, wilful, ungovernable, unmanageable, unruly, uncompliant, uncooperative We have run up against a highly resistant group of activists 3 Often, resistant to. impervious (to), impenetrable (to), repellent (to); proof (against); shedding You need a more resistant material This fabric is resistant to rain and snow.