C2 adjective/noun /ˌhaɪərəˈɡlɪfɪk/
hieroglyphic
jeroglífico
Meaning
Relating to or written in hieroglyphs; symbols or writing that is difficult to understand.
Example
The archaeologists studied the hieroglyphic inscriptions carefully.
Los arqueólogos estudiaron las inscripciones jeroglíficas cuidadosamente.