The Collaborative International Dictionary of English v.0.48:

Checker \Check"er\ (ch[e^]k"[~e]r), v. t. [imp. & p. p.
   Checkered (ch[e^]k"[~e]rd); p. pr. & vb. n. Checkering.]
   [From OF. eschequier a chessboard, F. ['e]chiquier. See
   Check, n., and cf. 3d Checker.]
   1. To mark with small squares like a checkerboard, as by
      crossing stripes of different colors.
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   2. To variegate or diversify with different qualities,
      colors, scenes, or events; esp., to subject to frequent
      alternations of prosperity and adversity.
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            Our minds are, as it were, checkered with truth and
            falsehood.                            --Addison.
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