state:
unsusceptibility.
susceptibleness:
insensitivity.
noun:
impenetrability,
inefficiency,
feebleness,
impotence,
inaptitude,
imbecility,
dulness,
inability,
invulnerability,
incapacity,
incompetence,
helplessness,
maladroitness,
invincibility,
weakness,
indomitability,
stupidity,
awkwardness.
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