Pronunciation: [ɡwˈɑːɹɪθˌɒl] (IPA)
Correct spelling for the English word "guaethol" is [ɡwˈɑːɹɪθˌɒl], [ɡwˈɑːɹɪθˌɒl], [ɡ_w_ˈɑː_ɹ_ɪ_θ_ˌɒ_l] (IPA phonetic alphabet).
Guaiacol ethyl.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.