ص د وṣ-d-w
(ن) صَدَا يَصْدُوْ صَدْوًاṣadā yaṣdū ṣadwan: (1) (of a thing) to be long (2) to clap.
Form II (tafʿīl) صَدّٰى يُصَدِّيْ تَصْدِيَةًṣaddā yuṣaddī taṣdiyatan: to clap with both hands. ﴿وَمَا كَانَ صَلَاتُهُمْ عِنْدَ الْبَيْتِ اِلَّا مُكَآءً وَّتَصْدِيَةً﴾ (Al-Anfāl 8:35)
Form V (tafaʿʿul) تَصَدّٰىtaṣaddā: to turn one's attention to someone (see ṣ-d-d). ﴿فَاَنْتَ لَهُۥ تَصَدّٰى﴾ (ʿAbasa 80:6)