C2 adjective/noun /ˌhaɪərəˈɡlɪfɪk/
hieroglyphic
ヒエログリフ的
Meaning
Relating to or written in hieroglyphs; symbols or writing that is difficult to understand.
Example
The archaeologists studied the hieroglyphic inscriptions carefully.
考古学者たちはヒエログリフ的な碑文を慎重に研究した。