56 entries under adjective topic. ×

13
resistant(insensitive, receptive, opposing)
9
immune
6
unsusceptible(insensitive, receptive, nonresistant, well-disposed)
6
adamant
5
insusceptible
5
impervious
5
strong
4
invulnerable
4
safe
3
impassive(cool, warm, sensitive, aloof)
3
resisting(verb, insensitive)
3
unresponsive
2
cautious
2
stoic
2
unlikely
1
shrewd
1
sturdy
1
vigorous
0
apathetic
0
astute
<123>
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APASmart Define. (2016). susceptible thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/susceptible/thesaurus/antonyms
ChicagoSmart Define. 2016. "susceptible thesaurus" https://smartdefine.org/susceptible/thesaurus/antonyms (accessed September 30, 2026).
HarvardSmart Define 2016, susceptible thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/susceptible/thesaurus/antonyms>.
MLASmart Define. "susceptible thesaurus" 23 March 2016. Web. 30 September 2026. <https://smartdefine.org/susceptible/thesaurus/antonyms>