Correct spelling for the English word "devolvment" is [dɪvˈɒlvmənt], [dɪvˈɒlvmənt], [d_ɪ_v_ˈɒ_l_v_m_ə_n_t] (IPA phonetic alphabet).
The act of devolving.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.