The spelling of "filicic acid anhydride" may seem daunting at first, but breaking it down into its phonetic components can help make it more approachable. The first word, "filicic," is pronounced "fɪˈlɪsɪk." The second word, "acid," is pronounced "ˈæsɪd." Lastly, "anhydride" is pronounced "ænˈhaɪdraɪd." Together, the entire word is pronounced "fɪˈlɪsɪk ˈæsɪd ænˈhaɪdraɪd." While the spelling may be complex, understanding the phonetic sounds can make it easier to say and comprehend.
Filicin.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.