ت ح تt-ḥ-t
— No verb from this root occurs in the Quran.
تَحْتtaḥt: noun of place (ẓarf makān), the opposite of فَوْقfawq; beneath, under. When its governed noun (muḍāf ilayh) is elided it becomes indeclinable (mabnī) with ḍammah (مِنْ تَحْتُmin taḥtu). 51 times in the Quran, mostly in the description of Paradise: ﴿جَنّٰتٍ تَجْرِيْ مِنْ تَحْتِهَا الْأَنْهٰرُ﴾ (Al-Baqarah 2:25); ﴿فَنَادٰىهَا مِنْ تَحْتِهَآ﴾ (Maryam 19:24)