kryptic
/ˈkrɪptɪk/Definitions
1. adjective
having a meaning that is not immediately apparent; mysterious or obscure
“The poet’s kryptic message left everyone confused about the true meaning of the poem.”
2. noun
something that is kryptic in nature; a mysterious or obscure thing
“The kryptic symbols etched into the ancient stone are still not fully understood by archaeologists.”