Correct spelling for the English word "malleableise" is [mˈaləblˌa͡ɪz], [mˈaləblˌaɪz], [m_ˈa_l_ə_b_l_ˌaɪ_z] (IPA phonetic alphabet).
To render any substance capable of extension under blows of a hammer.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.