ص خ خṣ-kh-kh
(ن) صَخَّ يَصُخُّ صَخًّاṣakhkha yaṣukhkhu ṣakhkhan (original form: صَخَخَ يَصْخُخُṣakhakha yaṣkhukhu): to deafen with an ear-splitting sound.
صَآخَّةٌṣākhkhah (feminine active participle, ism fāʿil): the sound that deafens the ears — one of the names of the Day of Resurrection. Only once in the Quran: ﴿فَاِذَا جَآءَتِ الصَّآخَّةُ﴾ (ʿAbasa 80:33)