Correct spelling for the English word "Desidious" is [dɪzˈɪdɪəs], [dɪzˈɪdɪəs], [d_ɪ_z_ˈɪ_d_ɪ__ə_s] (IPA phonetic alphabet).
Idle; lazy.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.