rough breathing

rough-breathing的词性：
n.Linguistics （名词）【语言学】

1. An aspirate sound in ancient Greek like that of the sound (h) in English.
送气音：古希腊语中类似英语中（h）音的送气音

2. The symbol (') written over some initial vowels and the letter rho in ancient Greek to indicate that a word begins with the sound (h).
送气符：写在古希腊语的某些开首元音上或字母P上的符号(')，表示该单词以发(h)音开始

3. In ancient Greek, a word beginning with the sound (h) plus a vowel or diphthong.
古希腊语中，以发(h)音的单元音或双元音开始的单词