Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

late 14c., from un- (2) "reverse of" + buckle (v.1). Related: Unbuckled; unbuckling.

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.