incomprehensible
US /ɪnˌkɑːm.prəˈhen.sə.bəl/
UK /ɪnˌkɑːm.prəˈhen.sə.bəl/
1.
impossible to understand or comprehend; unintelligible.
:
•
The instructions were so complex that they were almost incomprehensible.
•
His handwriting was completely incomprehensible.