This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. To remove the bark from a tree in a ring all the way around its trunk, normally killing the tree (because nutrients are carried through the phloem, the layers immediately under the bark, which layers are damaged by the process).

"Agricultural use has also allowed galah (Cacatua roseicapella) to invade from arid regions, but galahs ringbark trees and may be contributing to woodland decline."