ر ب طr-b-ṭ
(ض) رَبَطَ يَرْبِطُ رَبْطًاrabaṭa yarbiṭu rabṭan: to bind something firmly. ﴿وَرَبَطْنَا عَلٰى قُلُوْبِهِمْ﴾ (Al-Kahf 18:14)
رِبَاطٌribāṭ (also a noun, ism dhāt): that which has been bound firmly; tethered horses. ﴿وَمِنْ رِّبَاطِ الْخَيْلِ﴾ (Al-Anfāl 8:60)
Form III (mufāʿalah) رَابَطَ يُرَابِطُ مُرَابَطَةً وَرِبَاطًاrābaṭa yurābiṭu murābaṭatan wa-ribāṭan: to persevere in confronting the enemy, to remain always in readiness.
رَابِطْrābiṭ: imperative (amr). ﴿اصْبِرُوْا وَصَابِرُوْا وَرَابِطُوْا﴾ (Āl ʿImrān 3:200)