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)