noun
knotty wood; knotty tree
Refers to wood or a tree with many knots or gnarls. Often used in contexts like woodworking or describing the character of a tree.
この机は節榑の松材でできている。
This desk is made of knotty pine wood.
節榑の多い材木は加工が難しい。
Timber with many knots is difficult to work with.
節 (ふし) means 'knot' or 'node' in wood or bamboo. 節榑 (ふしくれ) specifically describes the knotty quality of wood or a tree as a whole.
Compound of 節 (ふし, 'knot') and 榑 (くれ, 'timber' or 'board'). The exact historical derivation is uncertain, but the combination naturally describes knotty wood.