A North American larch tree (Larix laricina), also called tamarack, known for its hard, durable wood used in shipbuilding and construction.
From Algonquian languages (possibly Mi'kmaq or Malecite) ackamack or similar, referring to the tree species native to northeastern North America, adopted into English colonial vocabulary.
Hackamatak wood was so valued for shipbuilding that 18th-century naval builders would travel far into northern forests to harvest these trees—the wood's extreme hardness and resistance to rot made it perfect for ship knees and structural supports that would last centuries.
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