Lewis & Short

ex-surdo (exurdo), āvi, ātum, 1, v. a. [surdus], to render deaf, to deafen (poet. and in post-Aug. prose).

  1. I. Lit.: paniculae flos si aures intraverit, exsurdat, Plin. 32, 10, 52, § 141.
  2. II. Transf.
      1. 1. In gen., to stun, overcome with din: aures curiae, Val. Max. 2, 2, 3: turbida nec calamos exsurdant classica nostros, Calp. Ecl. 4, 131.
      2. 2. Esp., of the taste, to dull, blunt: vina palatum, Hor. S. 2, 8, 38.