This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
凒 combines the ice radical 冫 with 豈, but the exact historical development and original meaning are uncertain.
With the ice radical 冫 and the component 豈, imagine a frozen, obscure shape—its meaning is as cold and unclear as ice.
For ギ, picture a geeky scholar trying to decipher this rare icy kanji: geek -> ギ, and the scholar is left cold by the puzzle.