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The Collaborative International Dictionary
Portcullising

Portcullis \Port*cul"lis\, v. t. [imp. & p. p. Portcullised; p. pr. & vb. n. Portcullising.] To obstruct with, or as with, a portcullis; to shut; to bar. [R.]
--Shak.

Wiktionary
portcullising

vb. (present participle of portcullis English)