Energicus/energic/energetic and an-nūn al-muʾakkida/nūn at-tawkīd (al-xafīfa wa-ṯ-ṯaqīla) in Arabic are parallel names for an optional ending of either single or geminate -n- which is occasionally suffixed to certain Semitic verb conjugations, particles, and prepositions. In Arabic, the energicus appears mostly in Classical Arabic and is found in many Qurʾānic passages (Wright 1896:61, 1898:24; Brockelmann 1908: 554–555, 1913:159; Reckendorf 1921:16; Fleisch 1979:128–132, 140–141; Fischer 2002: 110, 118, 120, 137, 230; Ambros 1989; Zewi 1999:13–63). The Arabic -n(n)- e…