名詞 deadwood:

1. a branch or a part of a tree that is dead
2. someone or something that is unwanted and unneeded
   同義詞：fifth wheel

1. The methods used have helped enormously in cutting out deadwood.
   這些方法在廢物利用方面起了相當大的作用。

dead.wood

n.（名詞）
Dead branches or wood on a tree.
枯枝，死木：樹上的枯枝或死木
One that is burdensome or superfluous.
無用人員，冗員：累贅的或多余的人
Nautical The vertical planking between the keel of a vessel and the sternpost, serving as a reinforcement.
【航海】 龍骨邦木，呆木：船的龍骨和艉柱之間的垂直板材，用來加固