can·ker /ˈkæŋkɚ/
 潰瘍,(樹的)癌腫病,毒害,弊害(vi.)患潰瘍,腐蝕,潰爛(vt.)使患潰瘍,使腐蝕
 can·ker /ˈkæŋkɚ/ 名詞
 潰瘍,(馬的)蹄癌,(樹上的)蛀孔
 Can·ker n.
 1. A corroding or sloughing ulcer; esp. a spreading gangrenous ulcer or collection of ulcers in or about the mouth; -- called also water canker, canker of the mouth, and noma.
 2. Anything which corrodes, corrupts, or destroy.
    The cankers of envy and faction.   --Temple.
 3. Hort. A disease incident to trees, causing the bark to rot and fall off.
 4. Far. An obstinate and often incurable disease of a horse's foot, characterized by separation of the horny portion and the development of fungoid growths; -- usually resulting from neglected thrush.
 5. A kind of wild, worthless rose; the dog-rose.
 To put down Richard, that sweet lovely rose.
 And plant this thorm, this canker, Bolingbroke.   --Shak.
 Black canker. See under Black.
 Can·ker v. t. [imp. & p. p. Cankered p. pr. & vb. n. Cankering.]
 1. To affect as a canker; to eat away; to corrode; to consume.
    No lapse of moons can canker Love.   --Tennyson.
 2. To infect or pollute; to corrupt.
    A tithe purloined cankers the whole estate.   --Herbert.
 Can·ker, v. i.
 1. To waste away, grow rusty, or be oxidized, as a mineral. [Obs.]
    Silvering will sully and canker more than gliding.   --Bacom.
 2. To be or become diseased, or as if diseased, with canker; to grow corrupt; to become venomous.
    Deceit and cankered malice.   --Dryden.
 As with age his body uglier grows,
 So his mind cankers.   --Shak.
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 canker
      n : an ulceration (especially of the lips or lining of the
          mouth)
      v 1: become infected with a canker
      2: infect with a canker
 Canker
    a gangrene or mortification which gradually spreads over the
    whole body (2 Tim. 2:17). In James 5:3 "cankered" means "rusted"
    (R.V.) or tarnished.