knock /ˈnɑk/
 (vi.)敲,敲打;相撞,碰撞;發出爆聲;找岔子,說壞話;奔忙,忙亂(vt.)敲,擊,打
 knock /ˈnɑk/ 名詞
 敲擊,叩音
 Knock v. i. [imp. & p. p. Knocked p. pr. & vb. n. Knocking.]
 1. To drive or be driven against something; to strike against something; to clash; as, one heavy body knocks against another.
 2. To strike or beat with something hard or heavy; to rap; as, to knock with a club; to knock on the door.
    For harbor at a thousand doors they knocked.   --Dryden.
    Seek, and ye shall find; knock, and it shall be opened unto you.   --Matt. vii. 7.
 3. To practice evil speaking or fault-finding; to criticize habitually or captiously. [Slang, U. S.]
 To knock about, to go about, taking knocks or rough usage; to wander about; to saunter. [Colloq.] “Knocking about town.” --W. Irving.
 To knock up, to fail of strength; to become wearied or worn out, as with labor; to give out. “The horses were beginning to knock up under the fatigue of such severe service.” --De Quincey.
 To knock off, to cease, as from work; to desist.
 To knock under, to yield; to submit; to acknowledge one's self conquered; -- an expression probably borrowed from the practice of knocking under the table with the knuckles, when conquered. “Colonel Esmond knocked under to his fate.” --Thackeray.
 Knock v. t.
 1. To strike with something hard or heavy; to move by striking; to drive (a thing) against something; as, to knock a ball with a bat; to knock the head against a post; to knock a lamp off the table.
    When heroes knock their knotty heads together.   --Rowe.
 2. To strike for admittance; to rap upon, as a door.
    Master, knock the door hard.   --Shak.
 3. To impress strongly or forcibly; to astonish; to move to admiration or applause. [Slang, Eng.]
 To knock in the head, or To knock on the head, to stun or kill by a blow upon the head; hence, to put am end to; to defeat, as a scheme or project; to frustrate; to quash. [Colloq.]
 To knock off. (a) To force off by a blow or by beating. (b) To assign to a bidder at an auction, by a blow on the counter. (c) To leave off (work, etc.). [Colloq.]
 To knock out, to force out by a blow or by blows; as, to knock out the brains.
 To knock up. (a) To arouse by knocking. (b) To beat or tire out; to fatigue till unable to do more; as, the men were entirely knocked up. [Colloq.] “The day being exceedingly hot, the want of food had knocked up my followers.” --Petherick. (c) Bookbinding To make even at the edges, or to shape into book form, as printed sheets. (d) To make pregnant.  Often used in passive, "she got knocked up". [vulgar]
 Knock, n.
 1. A blow; a stroke with something hard or heavy; a jar.
 2. A stroke, as on a door for admittance; a rap. “ A knock at the door.”
    A loud cry or some great knock.   --Holland.
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 knock
      n 1: the sound of knocking (as on a door or in an engine or
           bearing); "the knocking grew louder" [syn: knocking]
      2: negative criticism [syn: roast]
      3: a vigorous blow; "the sudden knock floored him"; "he took a
         bash right in his face"; "he got a bang on the head" [syn:
          bash, bang, smash, belt]
      4: a bad experience; "the school of hard knocks"
      5: the act of hitting vigorously; "he gave the table a whack"
         [syn: belt, rap, whack, whang]
      v 1: deliver a sharp blow or push :"He knocked the glass clear
           across the room" [syn: strike hard]
      2: rap with the knuckles; "knock on the door"
      3: knock against with force or violence; "My car bumped into
         the tree" [syn: bump]
      4: make light, repeated taps on a surface; "he was tapping his
         fingers on the table impatiently" [syn: tap, rap, pink]
      5: sound like a car engine that is firing too early; "the car
         pinged when I put in low-octane gasoline"; "The car pinked
         when the ignition was too far retarded" [syn: pink, ping]
      6: find fault with; express criticism of; point out real or
         perceived flaws; "The paper criticized the new movie";
         "Don't knock the food--it's free" [syn: criticize, criticise,
          pick apart] [ant: praise]
 Knock
    "Though Orientals are very jealous of their privacy, they never
    knock when about to enter your room, but walk in without warning
    or ceremony. It is nearly impossible to teach an Arab servant to
    knock at your door. They give warning at the outer gate either
    by calling or knocking. To stand and call is a very common and
    respectful mode. Thus Moses commanded the holder of a pledge to
    stand without and call to the owner to come forth (Deut. 24:10).
    This was to avoid the violent intrusion of cruel creditors.
    Peter stood knocking at the outer door (Acts 12:13, 16), and the
    three men sent to Joppa by Cornelius made inquiry and 'stood
    before the gate' (10:17, 18). The idea is that the guard over
    your privacy is to be placed at the entrance."
      Knocking is used as a sign of importunity (Matt. 7:7, 8; Luke
    13:25), and of the coming of Christ (Luke 12:36; Rev. 3:20).