خ س رkh-s-r
(س) خَسِرَ يَخْسَرُ خُسْرًا وَخُسْرَانًاkhasira yakhsaru khusran wa-khusrānan: (1) to suffer loss oneself (intransitive) (2) to bring someone into loss (transitive) — it takes its object directly. ﴿خَسِرَ الدُّنْيَا وَالْاٰخِرَةَ ذٰلِكَ هُوَ الْخُسْرَانُ الْمُبِيْنُ﴾ (Al-Ḥajj 22:11)
خُسْرٌkhusr: loss. ﴿اِنَّ الْاِنْسَانَ لَفِيْ خُسْرٍ﴾ (Al-ʿAṣr 103:2)
خَاسِرٌkhāsir pl. خٰسِرُوْنَkhāsirūna (active participle, ism fāʿil): loser, one who suffers loss. ﴿اُولٰٓئِكَ هُمُ الْخٰسِرُوْنَ﴾ (Al-Baqarah 2:27)
Form IV (ifʿāl) اَخْسَرَ يُخْسِرُ اِخْسَارًاakhsara yukhsiru ikhsāran: to give short measure, to cause loss. ﴿وَلَا تُخْسِرُوا الْمِيْزَانَ﴾ (Ar-Raḥmān 55:9)