indecipherable-decipherable-decipher-cipher

He uttered little indecipherable sounds.
他声音很小，听不清楚。
Maggie's writing was virtually indecipherable
玛吉的笔迹几乎无法辨认。
The letter was handwritten, in a hasty, barely decipherable scrawl.
这封信是仓促手写而成，潦草得几乎无法辨认。
And from what little we've been able to decipher so far.
根据我们所能够破译的一点信息。

All important plans were sent to the police in cipher.
所有重要计划均以密码送往警方。