木皮 is read as もくひ (mokuhi) and means tree bark.
もくひ
mokuhi
きのかわ
bark (of tree)
そうこんぼくひ
roots of herbs and barks of trees used in Chinese medicine
きわた
cotton (material)
こがらし
cold wintry wind
もくぞう
wooden
もくざい
lumber
きずみ
charcoal
もくへん
block (of wood)
もくせい
Jupiter (planet)
きど
entrance to an entertainment venue (i.e. sumo arena, etc.)
もくはん
wood-block printing
もっかん
wooden bobbin