1. 清辅音：voiced consonant 浊辅音 | voiceless consonant 清辅音 | vowel 元音
2. 清声母：辅音:consonant phoneme | 清声母:Voiceless consonant | 声母系统:Initial consonant system
3. 请辅音：Voiced sound浊音 | Voiceless consonant请辅音 | Voiceless sound清音
noun
1. a consonant produced without sound from the vocal cords
Synonym: surd