nut /ˈnʌt/
 堅果,核桃;難題,難事,難對付的人


 nut
 螺帽


 Nut n.
 1. Bot. The fruit of certain trees and shrubs (as of the almond, walnut, hickory, beech, filbert, etc.), consisting of a hard and indehiscent shell inclosing a kernel.
 2. A perforated block (usually a small piece of metal), provided with an internal or female screw thread, used on a bolt, or screw, for tightening or holding something, or for transmitting motion. See Illust. of 1st Bolt.
 3. The tumbler of a gunlock.
 4. Naut. A projection on each side of the shank of an anchor, to secure the stock in place.
 Check nut, Jam nut, Lock nut, a nut which is screwed up tightly against another nut on the same bolt or screw, in order to prevent accidental unscrewing of the first nut.
 Nut buoy. See under Buoy.
 Nut coal, screened coal of a size smaller than stove coal and larger than pea coal; -- called also chestnut coal.
 Nut crab Zool., any leucosoid crab of the genus Ebalia as, Ebalia tuberosa of Europe.
 Nut grass Bot., See nut grass in the vocabulary.
 Nut lock, a device, as a metal plate bent up at the corners, to prevent a nut from becoming unscrewed, as by jarring.
 Nut pine. Bot. See under Pine.
 Nut rush Bot., a genus of cyperaceous plants (Scleria) having a hard bony achene.  Several species are found in the United States and many more in tropical regions.
 Nut tree, a tree that bears nuts.
 Nut weevil Zool., any species of weevils of the genus Balaninus and other allied genera, which in the larval state live in nuts.


 Nut, v. i. [imp. & p. p. Nutted p. pr. & vb. n. Nutting.] To gather nuts.

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 nut
      n 1: usually large hard-shelled seed
      2: Egyptian goddess of the sky
      3: a small (usually square or hexagonal) metal block with
         internal screw thread to be fitted onto a bolt
      4: half the width of an em [syn: en]
      5: a whimsically eccentric person [syn: crackpot, crank, {nut
         case, nutcase, fruitcake, screwball]
      6: someone who is so ardently devoted to something that it
         resembles an addiction; "a golf addict"; "a car nut"; "a
         news junkie" [syn: addict, freak, junkie, junky]
      7: one of the two male reproductive glands that produce
         spermatozoa and secrete androgens; "she kicked him in the
         balls and got away" [syn: testis, testicle, orchis,
         ball, ballock, bollock, egg]
      v : gather nuts
      [also: nutting, nutted]