indecipherable

US /ˌɪn.dɪˈsaɪ.fɚ.ə.bəl/
UK /ˌɪn.dɪˈsaɪ.fɚ.ə.bəl/
1.

難以辨認的

unable to be read or understood:

:
•
Her handwriting is virtually indecipherable.