The gardener built the enclosure of the tea room from freshly cut green bamboo.
Compound of 青 (green/blue) + 竹 (bamboo). Note the rendaku: 竹 → だけ.
Usage
Refers specifically to bamboo that is still fresh and green, before it dries to a yellowish tan. The freshness matters for traditional uses such as tea ceremony utensils, New Year decorations, and crafts.