Correct spelling for the English word "unforgot" is [ʌnfəɡˈɒt], [ʌnfəɡˈɒt], [ʌ_n_f_ə_ɡ_ˈɒ_t] (IPA phonetic alphabet).
Not lost to memory; not overlooked.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.