Youngest

from The Collaborative International Dictionary of English v.0.48
Young \Young\ (y[u^]ng), a. [Compar. {Younger}
   (y[u^][ng]"g[~e]r); superl. {Youngest} (-g[e^]st).] [OE.
   yung, yong, [yogh]ong, [yogh]ung, AS. geong; akin to OFries.
   iung, iong, D. joing, OS., OHG., & G. jung, Icel. ungr, Sw. &
   Dan. ung, Goth. juggs, Lith. jaunas, Russ. iunuii, L.
   juvencus, juvenis, Skr. juva[,c]a, juvan. [root]281. Cf.
   {Junior}, {Juniper}, {Juvenile}, {Younker}, {Youth}.]
   [1913 Webster]
   1. Not long born; still in the first part of life; not yet
      arrived at adolescence, maturity, or age; not old;
      juvenile; -- said of animals; as, a young child; a young
      man; a young fawn.
      [1913 Webster]

            For he so young and tender was of age. --Chaucer.
      [1913 Webster]

            "Whom the gods love, die young," has been too long
            carelessly said; . . . whom the gods love, live
            young forever.                        --Mrs. H. H.
                                                  Jackson.
      [1913 Webster]

   2. Being in the first part, pr period, of growth; as, a young
      plant; a young tree.
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            While the fears of the people were young. --De Foe.
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   3. Having little experience; inexperienced; unpracticed;
      ignorant; weak.
      [1913 Webster]

            Come, come, elder brother, you are too young in
            this.                                 --Shak.
      [1913 Webster]
    
from Moby Thesaurus II by Grady Ward, 1.0
23 Moby Thesaurus words for "youngest":
      adolescent, baby, fledgling, hopeful, infant, junior, juvenal,
      juvenile, minor, pubescent, sapling, slip, sprig, stripling,
      teenager, teener, teenybopper, young hopeful, young person,
      younger, youngling, youngster, youth

    

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