棌

Usage notes
棌 椽不斲 （cǎi chuán bù zhuó）is an old idiom, which means using 棌木-caimu(oak) for making a rafter without carving figure and other decoration. And this idiom is for eulogizing that the great emperors 尧-yao and舜-shun are frugality. Because at the period of Yaoshun, they lived in the house that used undecorated oak wood for rafters.

Definitions

 * 1) oak