When you ask the meaning of a word, whether from a native speaker or a scholar, the answer is sometimes in their actions and not their words.
Al-Asma‘i said that ‘Isa ibn ‘Umar asked the poet Dhu 'l-Rumma about the meaning of naḍnāḍ. "All he did was flicker his tongue at me," ‘Isa said. Ibn Durayd reports this anecdote in Jamharat al-lugha, where he defines the verb naḍnaḍa as what a snake does with the tongue in its head, and says the snake is called al-naḍnāḍ for this reason.
In his commentary on Adab al-kuttab, al-Zajjaji reports that when someone asked the poet Ru’ba about the word shanab [which is the dewy glow of a young person's teeth], he made them look at a pomegranate seed.
Al-Qali reports in his Dictations that when al-Asma‘i was asked about the ‘awāriḍ of a man's beard [which cover his cheeks], he placed his hands on his cheeks above the ‘awāriḍ of his teeth [which are the bicuspids].
From Bringer of Light to the Language Sciences by Jalal al-Din al-Suyuti
