(ن، ض) قَتَرَ يَقْتُرُ وَيَقْتِرُ قَتْرًاqatara yaqturu wa-yaqtiru qatran: to be stingy in spending. ﴿وَالَّذِيْنَ اِذَآ اَنْفَقُوْا لَمْ يُسْرِفُوْا وَلَمْ يَقْتُرُوْا﴾ (Al-Furqān 25:67)
قَتُوْرٌqatūr (intensive form, ṣīghat al-mubālaghah, on the pattern of فَعُوْلٌfaʿūl): one who is very niggardly in spending, miserly. ﴿وَكَانَ الْاِنْسَانُ قَتُوْرًا﴾ (Al-Isrāʾ 17:100)
قَتَرٌ وَقَتَرَةٌqatar wa-qatarah (noun, ism dhāt): smoke, dusty blackness. ﴿تَرْهَقُهَا قَتَرَةٌ﴾ (ʿAbasa 80:41); ﴿وَلَا يَرْهَقُ وُجُوْهَهُمْ قَتَرٌ وَّلَا ذِلَّةٌ﴾ (Yūnus 10:26)
Form IV (ifʿāl) اَقْتَرَ يُقْتِرُ اِقْتَارًاaqtara yuqtiru iqtāran: for one's wealth to diminish, to be in straitened circumstances; مُقْتِرٌmuqtir (active participle, ism fāʿil): one in straitened circumstances, poor. ﴿وَعَلَي الْمُقْتِرِ قَدَرُهُۥ﴾ (Al-Baqarah 2:236)