#tongue.flap  the flap of material under the laces of a shoe or boot
  supertype:  flap  any broad thin and limber covering attached at one edge; hangs loose or projects freely; "he wrote on the flap of the envelope"
  part of:  boot  footwear that covers the whole foot and lower leg
  part of:  shoe  footwear shaped to fit the foot (below the ankle) with a flexible upper of leather or plastic and a sole and heel of heavier material

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