ث ب تth-b-t
(ن) ثَبَتَ يَثْبُتُ ثُبُوْتًاthabata yathbutu thubūtan: to remain fixed in one state. ﴿اِذَا لَقِيْتُمْ فِئَةً فَاثْبُتُوْا﴾ (Al-Anfāl 8:45)
ثَابِتٌthābit (active participle, ism fāʿil): fixed, firm. ﴿اَصْلُهَا ثَابِتٌ وَّفَرْعُهَا فِي السَّمَآءِ﴾ (Ibrāhīm 14:24)
Form IV (ifʿāl) اَثْبَتَ يُثْبِتُ اِثْبَاتًاathbata yuthbitu ithbātan: to let remain, to keep in place. ﴿يَمْحُوا اللّٰهُ مَا يَشَآءُ وَيُثْبِتُ﴾ (Ar-Raʿd 13:39)
Form II (tafʿīl) ثَبَّتَ يُثَبِّتُ تَثْبِيْتًاthabbata yuthabbitu tathbītan: to give the ability to remain fixed, to keep firm of foot. ﴿يُثَبِّتُ اللّٰهُ الَّذِيْنَ اٰمَنُوْا بِالْقَوْلِ الثَّابِتِ﴾ (Ibrāhīm 14:27)
ثَبِّتْthabbit (imperative, amr): make firm. ﴿وَثَبِّتْ اَقْدَامَنَا﴾ (Al-Baqarah 2:250)