
Indecipherable
Unreadable Writing
Used when someone's handwriting is so bad, you can't read it.
I tried to read his note, but it was indecipherable.
Complex Jargon
When specialized language is used and it's too complex for outsiders to understand.
The medical report was indecipherable to anyone not a doctor.
Mystery Languages
Refers to the difficulty of understanding unknown or ancient languages.
The archaeologists found indecipherable inscriptions on the ruins.