ب ل دb-l-d
— The lexicographers say the original sense is a trace or mark. 19 times in the Quran, each time as a noun.
بَلَدbalad pl. بِلَاد وَبُلْدَانbilād wa-buldān: a defined tract of land, a town or settlement. ﴿وَإِذْ قَالَ إِبْرَاهِيْمُ رَبِّ اجْعَلْ هٰذَا بَلَدًا آمِنًا﴾ (Al-Baqarah 2:126); ﴿لَا يَغُرَّنَّكَ تَقَلُّبُ الَّذِيْنَ كَفَرُوْا فِي الْبِلَادِ﴾ (Āl ʿImrān 3:196)
بَلْدَةbaldah: feminine of بَلَدbalad, and more specific. ﴿بَلْدَةٌ طَيِّبَةٌ وَّرَبٌّ غَفُوْرٌ﴾ (Sabaʾ 34:15)
بَلِيْدbalīd: dull-witted (inert like the earth).