noun
unbarked lumber; rough timber
Refers to wood or logs that still have the bark attached, often used in construction or rustic settings.
山小屋の柱には黒木が使われている。
Unbarked lumber is used for the pillars of the mountain hut.
黒木のままの丸太が庭に積まれていた。
Logs with the bark still on were piled in the garden.
Compound of 黒 (kuro, 'black') and 木 (ki, 'tree/wood'), referring to the dark appearance of wood with bark still on it.