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To remove something, typically a tree, by cutting it down. A noun or pronoun can be used between "hack" and "down." The landscaper came and hacked down the tree that was leaning precariously over our roof.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
hack something down
to chop something down. Who hacked this cherry tree down? Who hacked down this cherry tree?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.