Past tense of chalk; marked, wrote, or drew on a surface using chalk, or covered with chalk dust.
From 'chalk' (the material) + '-ed' (past tense marker). 'Chalk' itself comes from Latin 'calx' meaning limestone or heel.
The versatility of 'chalked' as a verb—from writing on a board to marking a pool cue to drawing hopscotch lines—shows how one simple material inspired completely different human activities.
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