Simple past tense and past participle of splinter.(verb)
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Use "splintered" in a sentence
"Bill built the fire into a roaring blaze, feeding it with sticks splintered from the dead palm."
"Wood splintered from the French deck and side as the shots punched out."
"The royal apartments had once been lined with fine limestone slabs exquisitely sculptured and painted; but these had been literally mashed to pieces before the place was fired, and lay in splintered heaps among the débris of charred beams and blackened bricks."