cabalistic

Of or relating to a cabal; secretive and cliquish.

Inexplicitly popular and expressive.

In the coming months "OK" was described as cabalistic on many occasions. The term "cabalistic" was used in a virtual sense in that the expression seemed to have an inexplicably popular and inexplicably expressive dimension to it.

Of or relating to Kabbalah.

Aaron is the author of "Bet Aharon" (Aaron's House; Brody, 1875), which contains his cabalistic and ethical expositions of the Pentateuch.