ح ذ رḥ-dh-r
(س) حَذِرَ يَحْذَرُ حَذَرًاḥadhira yaḥdharu ḥadharan: to be on one's guard, to beware, to fear. ﴿يَحْذَرُ الْاٰخِرَةَ وَيَرْجُوْا رَحْمَةَ رَبِّهِۦ﴾ (Az-Zumar 39:9)
حَذَرٌḥadhar: fear, dread. ﴿حَذَرَ الْمَوْتِ﴾ (Al-Baqarah 2:19)
حِذْرٌḥidhr: a means of protection, arms. ﴿خُذُوْا حِذْرَكُمْ﴾ (An-Nisāʾ 4:71)
مَحْذُوْرٌmaḥdhūr (an intransitive verb takes no object, so this is a noun, ism dhāt): that which is to be guarded against. ﴿اِنَّ عَذَابَ رَبِّكَ كَانَ مَحْذُوْرًا﴾ (Al-Isrāʾ 17:57)
Form II (tafʿīl) حَذَّرَ يُحَذِّرُ تَحْذِيْرًاḥadhdhara yuḥadhdhiru taḥdhīran: to admonish to be on one's guard. ﴿وَيُحَذِّرُكُمُ اللّٰهُ نَفْسَهُۥ﴾ (Āl ʿImrān 3:28)