You sure about that origin? I checked and the origin of the word seems to come from the word for earth.
I think they are referring to "إنسان" or "Insaan" which has the root of nisyah which means "to forget".
My understanding is that this isn't the common word for person, which would be "شخص" or shakhs. However that also doesn't originate from the word for earth. What word are you referring too?
I'd love for an arabic speaker to chime in!
I think they read the grandparent post as suggesting that the English word 'human' came from Arabic, rather than your (correct) inference that they meant the Arabic word for human.
But another poster said there are multiple words for human in Arabic, so now I'm not sure.
The root of "human" إنسان (insaan) is ء ن س (ʾ-n-s)
The root of "forget" إنس (insa) is ن س ي (n-s-y)
Not the same root.
The word templates and roots are different, but the combination root1+template1 happens to look identical to root2+template2. (each arabic word is a 3-letter root + assigned into a large n-letter word template)
insa is the second-person masculine singular active imperative of نَسِيَ (nasiya), equivalent to the command "forget!" in english, addressed to male.
I think I found the root of this rumor [3] (some religious mumbo jumbo):
"In Egyptian Arabic, the word 'insan' means 'human'. If we remove the 'n', the word becomes 'insa', which means 'to forget'. So you see, the word 'forget' is taken from the word 'human'. And since it was God who created our minds and hearts, He knew from the very beginning that we would quickly forget our history"
refs:
[1] human - https://en.wiktionary.org/wiki/%D8%A5%D9%86%D8%B3%D8%A7%D9%8...
[2] forget - https://en.wiktionary.org/wiki/%D9%86%D8%B3%D9%8A
[3] https://www.goodreads.com/quotes/7942501-in-egyptian-arabic-...
Note: I corrected my comment - previously I spelled the second word incorrectly.
You probably searched for the one related to Adam, and the parent's claim concerns the third one (I still couldn't verify the claim with a 30 second search, but it's plausible enough and the word does seem phonetically similar to the verb, which counts for something in Arabic).