(ض) مَسَكَ يَمْسِكُ مَسْكًاmasaka yamsiku maskan: to cling to something, to hold on to it. (This verb is not used in the Quran.)
مِسْكٌmisk (noun, ism dhāt): musk. Only once in the Quran: ﴿خِتٰمُهُۥ مِسْكٌ﴾ (Al-Muṭaffifīn 83:26)
Form IV (ifʿāl) اَمْسَكَ يُمْسِكُ اِمْسَاكًاamsaka yumsiku imsākan: to hold back, to withhold, to retain. ﴿فَاِمْسَاكٌۢ بِمَعْرُوْفٍ اَوْ تَسْرِيْحٌۢ بِاِحْسَانٍ﴾ (Al-Baqarah 2:229); ﴿اِنَّ اللّٰهَ يُمْسِكُ السَّمٰوٰتِ وَالْاَرْضَ اَنْ تَزُوْلَا﴾ (Fāṭir 35:41)
Form II (tafʿīl) مَسَّكَ يُمَسِّكُ تَمْسِيْكًاmassaka yumassiku tamsīkan: to hold on firmly. ﴿وَالَّذِيْنَ يُمَسِّكُوْنَ بِالْكِتٰبِ﴾ (Al-Aʿrāf 7:170)
Form X (istifʿāl) اِسْتَمْسَكَ يَسْتَمْسِكُ اِسْتِمْسَاكًاistamsaka yastamsiku istimsākan: to take firm hold deliberately. ﴿فَقَدِ اسْتَمْسَكَ بِالْعُرْوَةِ الْوُثْقٰى﴾ (Al-Baqarah 2:256); ﴿فَاسْتَمْسِكْ بِالَّذِيْٓ اُوْحِيَ اِلَيْكَ﴾ (Az-Zukhruf 43:43)