Vap·id a. Having lost its life and spirit; dead; spiritless; insipid; flat; dull; unanimated; as, vapid beer; a vapid speech; a vapid state of the blood.
A cheap, bloodless reformation, a guiltless liberty, appear flat and vapid to their taste. --Burke.
-- Vap*id*ly adv. -- Vap*id*ness, n.
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vapidly
adv : in a vapid manner; "a vapidly smiling salesman"