ط ی بṭ-y-b
(ض) طَابَ يَطِيْبُ طِيْبًاṭāba yaṭību ṭīban: (1) to be fine and pure (2) to be pleased with something. ﴿فَانْكِحُوْا مَا طَابَ لَكُمْ مِّنَ النِّسَآءِ﴾ (An-Nisāʾ 4:3)
طَيِّبٌṭayyib (adjective on the pattern of فَيْعِلٌfayʿil, اصلًا طَيْيِبٌaṣlan ṭayyib): pure, pleasant. ﴿كُلُوْا مِنْ طَيِّبٰتِ مَا رَزَقْنٰكُمْ﴾ (Al-Baqarah 2:172); ﴿بَلْدَةٌ طَيِّبَةٌ وَّرَبٌّ غَفُوْرٌ﴾ (Sabaʾ 34:15)
طُوْبٰىṭūbā (اصلًا طُيْبٰىaṣlan ṭuybā, on the pattern of فُعْلٰىfuʿlā): purer. ﴿طُوْبٰى لَهُمْ وَحُسْنُ مَاٰبٍ﴾ (Ar-Raʿd 13:29)