unsusceptible

from WordNet (r) 3.0 (2006)

unsusceptible
    adj 1: not susceptible to [syn: {unsusceptible},
           {insusceptible}] [ant: {susceptible}]

from The Collaborative International Dictionary of English v.0.48

Unsusceptible \Unsusceptible\
   See {susceptible}.

from Moby Thesaurus II by Grady Ward, 1.0

99 Moby Thesaurus words for "unsusceptible":
      affectless, anesthetized, arctic, autistic, blunt, catatonic,
      changeless, chill, chilly, closed to, cold, cold as charity,
      cold-blooded, coldhearted, constant, cool, dispassionate, drugged,
      dull, emotionally dead, emotionless, frigid, frosted, frosty,
      frozen, heartless, icy, immovable, immutable, impassible,
      impassive, impersuadable, impersuasible, impervious, incommutable,
      inconvertible, indefeasible, inert, inexcitable, inflexible,
      insensitive, insentient, insusceptible, insusceptible of change,
      intransmutable, invariable, irretrievable, irreversible,
      irrevocable, lasting, noble, nonemotional, nonreturnable,
      nonreversible, objective, obstinate, obtuse, out of touch,
      passionless, permanent, reverseless, self-absorbed, soulless,
      spiritless, unaffectionate, unalterable, unalterative, unaltered,
      unamenable, unchangeable, unchanged, unchanging, undeflectable,
      undeviating, unemotional, unfeeling, unimpassioned, unimpressible,
      unimpressionable, uninfluenceable, unloving, unmodifiable,
      unmovable, unpassionate, unpersuadable, unpliable, unreceptive,
      unremitting, unresponding, unresponsive, unrestorable,
      unreturnable, unsuggestible, unswayable, unsympathetic,
      untouchable, unvariable, unvarying, unyielding