The Collaborative International Dictionary
Unbreeched
Unbreech \Un*breech"\, v. t. [imp. & p. p. Unbreeched; p. pr. & vb. n. Unbreching.] [1st pref. un- + breech.]
To remove the breeches of; to divest or strip of breeches.
--Shak.(Gun.) To free the breech of, as a cannon, from its fastenings or coverings.
--Pennant.
Wiktionary
unbreeched
a. Not wearing breeches.