noun Date: 1746 a mark ʽ used in Greek over some initial vowels to show that they are aspirated or over ρ to show that it is voiceless, the sound indicated by a mark ʽ over a Greek vowel or ρ
ROUGH BREATHING
Meaning of ROUGH BREATHING in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012