Tamam ilm tere hain hunar bhi tere hain

Re: Tamam ilm tere hain hunar bhi tere hain

aabshar = fall (Niagra fall)

Alamton men bayaN ki haqiqateN Apni
Kalim tera hai Aur khizar bhi tere hain

(refers to the incident mentioned in Surah e Kahaf, where Hazrat Moosa traveled with Hazrat Khizar, on the condition that he won’t ask about actions of Khizar). Kalim = Jis se kalaam kia jae, baat ki jae. title of Hazrat Moosa

mokhtalif Safahten, mukhatalif is different. safahaten , I 'm not sure may be its siffaten (characteristics)

Zabar Khak = khak ke neeche = buried

your understanding as to naik o bad is correct.