arch /ˈɑrʧ/
 拱門,弓形,腳弓(vt.)成弓形彎曲(vi.)拱起,成弓形(a.)主要的,狡猾的
 arch /ˈɑrʧ/ 名詞
 弓形,弓狀物
 Arch n.
 1. Geom. Any part of a curved line.
 2. Arch. (a) Usually a curved member made up of separate wedge-shaped solids, with the joints between them disposed in the direction of the radii of the curve; used to support the wall or other weight above an opening.  In this sense arches are segmental, round (i. e., semicircular), or pointed. (b) A flat arch is a member constructed of stones cut into wedges or other shapes so as to support each other without rising in a curve.
 Note: ☞ Scientifically considered, the arch is a means of spanning an opening by resolving vertical pressure into horizontal or diagonal thrust.
 3. Any place covered by an arch; an archway; as, to pass into the arch of a bridge.
 4. Any curvature in the form of an arch; as, the arch of the aorta.  “Colors of the showery arch.”
 Triumphal arch, a monumental structure resembling an arched gateway, with one or more passages, erected to commemorate a triumph.
 Arch, v. t. [imp. & p. p. Arched p. pr. & vb. n. Arching.]
 1. To cover with an arch or arches.
 2. To form or bend into the shape of an arch.
    The horse arched his neck.   --Charlesworth.
 Arch, v. i. To form into an arch; to curve.
 ◄ ►
 Arch a.
 1. Chief; eminent; greatest; principal.
    The most arch act of piteous massacre.   --Shak.
 2. Cunning or sly; sportively mischievous; roguish; as, an arch look, word, lad.
    [He] spoke his request with so arch a leer.   --Tatler.
 Arch, n.  A chief. [Obs.]
    My worthy arch and patron comes to-night.   --Shak.
 ◄ ►
 arch
      adj 1: (of persons) highest in rank or authority or office; "his
             arch rival" [syn: arch(a)]
      2: (used of behavior or attitude) characteristic of those who
         treat others with condescension [syn: condescending, patronizing,
          patronising]
      3: expert in skulduggery; "an arch criminal" [syn: arch(a)]
      n 1: a curved shape in the vertical plane that spans an opening
      2: a curved bony structure supporting or enclosing organs
         (especially arches of the feet)
      3: a passageway under an arch [syn: archway]
      4: (architecture) a masonry construction (usually curved) for
         spanning an opening and supporting the weight above it
      v : form an arch or curve; "her back arches"; "her hips curve
          nicely" [syn: curve, arc]
 Arch
    an architectural term found only in Ezek. 40:16, 21, 22, 26, 29.
    There is no absolute proof that the Israelites employed arches
    in their buildings. The arch was employed in the building of the
    pyramids of Egypt. The oldest existing arch is at Thebes, and
    bears the date B.C. 1350. There are also still found the remains
    of an arch, known as Robinson's Arch, of the bridge connecting
    Zion and Moriah. (See TYROPOEON VALLEY.)