nunation
nounUS, UK /nʌˈneɪ.ʃən/
Etymology From nun (“Semitic letter”) + -ation, after Arabic تَنْوِين (tanwīn), verbal noun of نَوَّنَ (nawwana, literally “to nunate, nunify”), derived from the letter name نُون (nūn).
1
In Standard Arabic, The use of a suffix ("-n") signifying a lack of syntactical definiteness of the noun or adjective.
2
In Akkadian, the use of a suffix ("-n") in dual forms.