imperturbable

from WordNet (r) 3.0 (2006)
imperturbable
    adj 1: not easily perturbed or excited or upset; marked by
           extreme calm and composure; "hitherto imperturbable, he
           now showed signs of alarm"; "an imperturbable self-
           possession"; "unflappable in a crisis" [syn:
           {imperturbable}, {unflappable}]
from The Collaborative International Dictionary of English v.0.48
Imperturbable \Im`per*turb"a*ble\, a. [L. imperturbabilis; pref.
   im- not + perturbare to disturb: cf. F. imperturbable. See
   {Perture}.]
   Incapable of being disturbed or disconcerted; as,
   imperturbable gravity.
   [1913 Webster]
from Moby Thesaurus II by Grady Ward, 1.0
45 Moby Thesaurus words for "imperturbable":
      balanced, bovine, collected, complacent, composed, cool,
      dispassionate, dull, even-tempered, fast, fiducial, firm,
      firm as Gibraltar, impassive, in equilibrium, inexcitable,
      inirritable, nonchalant, patient, predictable, reliable, secure,
      self-satisfied, smug, solid, sound, stable, steadfast, steady,
      stoic, stolid, substantial, unaffected, undisturbable, unflappable,
      unflinching, unirritable, unmoved, unnervous, unpassionate,
      unshakable, untouched, unwavering, well-balanced, without nerves
antiflux / dictionary / imperturbable
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