swale /ˈswe(ə)l/
  沼澤地,低洼地(vt.)放火燒(vi.)燒焦
  Swale n.  A valley or low place; a tract of low, and usually wet, land; a moor; a fen. [Prov. Eng. & Local, U.S.]
  Swale, v. i. & t. To melt and waste away; to singe. See Sweal, v.
  Swale, n. A gutter in a candle. [Prov. Eng.]
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  Sweal v. i. [imp. & p. p. Swealed p. pr. & vb. n. Swealing.]  To melt and run down, as the tallow of a candle; to waste away without feeding the flame. [Written also swale.]