IPA: /ˈkrɪptəl/
KK: /ˈkrɪptəl/
Relating to hidden or secret places, often used in the context of underground chambers or tombs.
The archaeologists discovered cryptal structures beneath the ancient city.
Cryptal → It is formed from "crypt" (from Greek "kryptos", meaning hidden or secret) and the suffix "-al" (meaning pertaining to). The word "cryptal" refers to something that is pertaining to or characteristic of a hidden or secret place.
Think of 'hidden' ('kryptos') to remember that 'cryptal' relates to something secret or concealed.