لِسَانًا

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – لِسَانًا is a noun

A noun may either be 1) Definite or indefinite 2) Masculine or feminine 3) Singular, dual or plural 4) Nominative, accusative or genitive

لِسَانٌ is the natural state of this definite noun and becomes لِسَانًا due to it being the: 1) المَفْعُوْلُ بِهِ object of a verb or 2) اسْمُ of إِنَّ or 3) خَبَرُ of كَانَ or 4) المَفْعُوْلُ فِيْهِ adverb of time or place or 5) المَفْعُوْلُ لَهُ noun that gives the reason for doing a thing or 6) المَفْعُوْلُ مَعَهُ noun that comes after the و which means “along with” or 7) المَفْعُوْلُ المُطْلَقُ is the مَصْدَرٌ of the verb occurring in the sentence or 8) الحَالُ adverb of manner or 9) التَّمْيِيْزُ noun that specifies the meaning of a vague word or 10) المُسْتَثْنَى noun that comes after إِلَّا meaning “except” or 11) المُنَادَى noun of calling

Language; Tongue; Epistle; Letter; What as speech can be pronounced by the tongue

To seize one by the tongue, bite one in words, make a thing sharp-pointed

نَكِرَةٌمُفْرَدٌمُذَكَّرٌمَنْصُوْبٌل س نبَاب فَتَحَ لَسَنَ يَلْسَنُفِعَالٌاسْمٌاِسْمُ الجِنْسِ
IndefiniteSingularMasculineAccusativeRootTongueفPatternNounGeneric or common Noun
Surah/Below are the 2 verses in the holy Quran containing the indefinite, accusative nounلِسَانًا
Verse 
28-34
46-12
90-9and a tongue and a pair of lips?وَلِسَانًا وَشَفَتَيْنِ