vapid
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1. Of liquors, beverages, etc.: Devoid of briskness; failing to
produce an agreeable effect on the palate; flat, insipid.

    b. Said of taste or flavour.

    c. Med. Of blood: Devoid of strength or vigour; weak, inert.

    d. Of flowers: Scentless. rare{em}1.

    2. fig. Devoid of animation, zest, or interest; dull, flat,
lifeless, insipid:    a. Of talk, discourse, writings, etc.

    b. Of amusements, pleasures, etc.

    c. Of persons or places.

    d. In miscellaneous contexts.

    {dag}3. Of a damp or steamy character; dank; vaporous. Obs.

    Hence {sm}vapidism. rare{em}1.