undull

English

Etymology 1

From Middle English undull, equivalent to un- (“not”) +‎ dull.

Adjective

undull (comparative more undull, superlative most undull)

1. Not dull; sharp.

Etymology 2

From un- +‎ dull.

Verb

undull (third-person singular simple present undulls, present participle undulling, simple past and past participle undulled)

1. (transitive) To remove the dullness of; clear.
   • 1654, Richard Whitlock, Zootomia; Or, Observations on the Present Manners of the English:

     It is a most musicall Modulator of all Intelligibles by her inventive Variations, undulling their Grossenesse, and subliming it into more refined Acceptablenesse to our own, or others understandings.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “undull”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)