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The Collaborative International Dictionary
Disafforesting

Disafforest \Dis`af*for"est\, v. t. [imp. & p. p. Disafforested; p. pr. & vb. n. Disafforesting.] [Pref. dis- + afforest: cf. OF. desaforester.] (Eng. Law) To reduce from the privileges of a forest to the state of common ground; to exempt from forest laws.

By charter 9 Henry III. many forests were disafforested.
--Blackstone.

Wiktionary
disafforesting

vb. (present participle of disafforest English)