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 ]
[しょうようじじゃく(uK), shouyoujijaku (uK)](adj-t, adv-to) (arch) having presence of mind; imperturbable; calm and self-possessed; with serenity[Add to Longdo]