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Webster 1913 Edition

Verb.

[L.

retundere

retusum

; pref.

re-

re- +

tundere

to beat.]

To blunt; to turn, as an edge; figuratively, to cause to be obtuse or dull;

as, to

retund

confidence

Ray. Cudworth.

Verb.

[l. retundo; re and rundo, to beat.]

To blunt; to turn; as an edge; to dull; as, to retund the edge of a weapon.

retund ‎(third-person singular simple present retunds, present participle retunding, simple past and past participle retunded)

(transitive) To blunt; to turn, as an edge.
- Ralph Cudworth
  Covered with skin and hair keeps it warm, being naturally a very cold part, and also to quench and dissipate the force of any stroke that shall be dealt it, and retund the edge of any weapon.
(transitive, figuratively) To cause to be obtuse or dull.
to retund confidence