IMPERTURBABLE

imperturbable. Imperturbable, a. unpassable, thick, inaccessible

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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.