心しん材ざいしんざいMeanings1nounheartwoodThe dense, non-living central wood of a tree, often darker and more durable than the outer sapwood. Used in woodworking and botany.このテーブルは心しん材ざいを使つかっているので、とても丈じょう夫ぶです。This table uses heartwood, so it is very sturdy.
