trod
 tread的過去式和過去分詞
 Trod imp. & p. p. of Tread.
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 Tread v. i. [imp. Trod p. p. Trodden Trod; p. pr. & vb. n. Treading.]
 1. To set the foot; to step.
    Where'er you tread, the blushing flowers shall rise.   --Pope.
    Fools rush in where angels fear to tread.   --Pope.
 The hard stone
 Under our feet, on which we tread and go.   --Chaucer.
 2. To walk or go; especially, to walk with a stately or a cautious step.
    Ye that . . . stately tread, or lowly creep.   --Milton.
 3. To copulate; said of birds, esp. the males.
 To tread on or To tread upon. (a) To trample; to set the foot on in contempt. “Thou shalt tread upon their high places.” --Deut. xxxiii. 29. (b) to follow closely. “Year treads on year.” --Wordsworth.
 To tread upon the heels of, to follow close upon. “Dreadful consequences that tread upon the heels of those allowances to sin.” --Milton.
    One woe doth tread upon another's heel.   --Shak.
 tread
      n 1: a step in walking or running [syn: pace, stride]
      2: the grooved surface of a pneumatic tire
      3: the part (as of a wheel or shoe) that makes contact with the
         ground
      4: structural member consisting of the horizontal part of a
         stair or step
      v 1: put down or press the foot, place the foot; "For fools rush
           in where angels fear to tread"; "step on the brake"
           [syn: step]
      2: tread or stomp heavily or roughly; "The soldiers trampled
         across the fields" [syn: trample]
      3: crush as if by treading on; "tread grapes to make wine"
      4: brace (an archer's bow) by pressing the foot against the
         center
      5: apply (the tread) to a tire
      6: mate with; "male birds tread the females"
      [also: trodden, trod]
 trod
      See tread