(By the way, a doorframe or something similar — something constructed to
hold a door or gate, whether the door/gate is there or not — is a
{lIvqa'nan}.)
This really looks like it wants to be a pun.
Also, I wonder if Klingons call out {lIvqa'nan!} to leave their holodecks. (In Federation Standard, you call out "arch!", which is basically techspeak for "doorframe".)