(ن) جَابَ يَجُوْبُ جَوْبًاjāba yajūbu jawban: to traverse a distance, to cut something out. ﴿وَثَمُوْدَ الَّذِيْنَ جَابُوا الصَّخْرَ بِالْوَادِ﴾ (Al-Fajr 89:9)
جَوَابٌjawāb (noun, ism dhāt): the answer to a statement — the speaker's words travel a certain distance, and the answerer's words travel that same distance. ﴿وَمَا كَانَ جَوَابَ قَوْمِهِۦٓ﴾ (Al-Aʿrāf 7:82)
Form IV (ifʿāl) اَجَابَ يُجِيْبُ اِجَابَةًajāba yujību ijābatan: to answer a statement, to accede to someone's word, to grant a request. ﴿اُجِيْبُ دَعْوَةَ الدَّاعِ اِذَا دَعَانِ﴾ (Al-Baqarah 2:186)
Form X (istifʿāl) اِسْتَجَابَ يَسْتَجِيْبُ اِسْتِجَابَةًistajāba yastajību istijābatan: to comply, and to regard compliance as binding. ﴿فَاسْتَجَابَ لَهُمْ رَبُّهُمْ﴾ (Āl ʿImrān 3:195)
اِسْتَجِبْistajib (imperative verb, amr): comply, respond. ﴿اِسْتَجِيْبُوْا لِلّٰهِ وَلِلرَّسُوْلِ﴾ (Al-Anfāl 8:24)