"Tree roots" refers to the part of a tree that is usually hidden beneath the ground. These roots are like the tree's feet, helping it stand tall and providing it with water and nutrients from the soil. Full definition
He has difficulty navigating the uneven terrain of tree roots and crumbling stone. (bookbrowse.com)
He told me about tree roots in sewer lines, sinking foundations, and other big repairs to his rehab houses that cost him thousands of dollars. (biggerpockets.com)
If underground plumbing has been ruined by tree roots, for example, a warranty may not fix it. (policygenius.com)