Crossword puzzle clue "thin esoteric"

RAREFY, to make less dense, also RARIFY

difficult to understand

abstruse, esoteric, also ACROAMATIC

either of the two divisions of a pack of tarot cards

mysterious

(Hebrew) a Jewish doctrine based on hidden meanings in sacred texts, also CABBALA, CABBALAH, KABALA, KABBALA, KABBALAH, QABALA, QABALAH

CABALA, (Hebrew) a Jewish doctrine based on hidden meanings in sacred texts, also CABBALA, CABBALAH, KABALA, KABBALA, KABBALAH, QABALA, QABALAH

CULT, a religious society