The Meaning of Istiwa' in Language

Uthman al-Darimi, in his refutation of Bishr al-Murisi, stated that istiwa' means sitting. What is your opinion?
Istiwa' upon something in the Arabic language means sitting.Allah the Exalted said: [Surah al-Zukhruf: 12-13] Is a person on the back of a mount sitting or standing? He is sitting, but is it correct to extend this to Allah's istiwa' upon the Throne? This is a matter for consideration. If it is established from the Salaf that they interpreted it as sitting, then they are more knowledgeable about this than we are; otherwise, there is doubt in it.Otherwise, we say: The manner of istiwa' is unknown, and part of that ignorance is that we do not know whether He is sitting or not sitting.But we say: The meaning of istiwa' is rising above, and this is a matter of no doubt.Istiwa' upon the Throne means: He rose with a specific rising, not the general rising that is over all creation.