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sleuth

[slooth]
noun
  1. a detective.
  2. a bloodhound, a dog used for tracking.
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verb (used with or without object)
  1. to track or trail, as a detective.
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Origin of sleuth

First recorded in 1875–80; short for sleuthhound
Related formssleuth·like, adjectivesu·per·sleuth, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for supersleuth

sleuth

noun
  1. an informal word for detective
  2. short for sleuthhound (def. 1)
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verb
  1. (tr) to track or follow
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Word Origin

C19: short for sleuthhound, from C12 sleuth trail, from Old Norse sloth; see slot ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for supersleuth

sleuth

n.

c.1200, "track or trail of a person," from Old Norse sloð "trail," of uncertain origin. Meaning "detective" is 1872, shortening of sleuth-hound "keen investigator" (1849), a figurative use of a word that dates back to late 14c. meaning a kind of bloodhound. The verb (intransitive) meaning "to act as a detective, investigate" is recorded from 1905. Related: Sleuthed; sleuthing.

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Online Etymology Dictionary, © 2010 Douglas Harper