unvoiced
/ˌʌnˈvɔɪst/adjective
1
- not expressed in words; unuttered未用言词表达的; 未说出的：
a person's unvoiced thoughts.
一个人未说出来的想法。
2
- Phonetics (of a speech sound) uttered without vibration of the vocal cords【语音】清音的。