(ن) قَعَدَ يَقْعُدُ قُعُوْدًاqaʿada yaqʿudu quʿūdan: to sit; to sit back (from a task). ﴿فَلَا تَقْعُدْ بَعْدَ الذِّكْرٰى مَعَ الْقَوْمِ الظّٰلِمِيْنَ﴾ (Al-Anʿām 6:68)
قَاعِدٌqāʿid pl. قُعُوْدٌ وَقٰعِدُوْنَquʿūd wa-qāʿidūna (active participle, ism fāʿil): one who sits; «قُعُوْدquʿūd» is both a verbal noun (maṣdar) and the broken plural of قَاعِدqāʿid. ﴿اَلَّذِيْنَ يَذْكُرُوْنَ اللّٰهَ قِيٰمًا وَّقُعُوْدًا﴾ (Āl ʿImrān 3:191)
قَاعِدَةٌqāʿidah pl. قَوَاعِدُqawāʿidu (feminine active participle, ism fāʿil): she who sits; from this basic sense (1) foundation (2) an elderly woman who has sat back from marriage (3) a rule, a general principle. ﴿وَاِذْ يَرْفَعُ اِبْرٰهِيْمُ الْقَوَاعِدَ مِنَ الْبَيْتِ﴾ (Al-Baqarah 2:127)
قَعِيْدٌqaʿīd (adjective on the pattern of فَعِيْلٌfaʿīl; the same for singular, plural, masculine and feminine): one who sits alongside, a watcher. ﴿عَنِ الْيَمِيْنِ وَعَنِ الشِّمَالِ قَعِيْدٌ﴾ (Qāf 50:17)
مَقْعَدٌmaqʿad pl. مَقَاعِدُmaqāʿidu (noun of time or place, ẓarf): a sitting place, a station. ﴿فِيْ مَقْعَدِ صِدْقٍ﴾ (Al-Qamar 54:55)