Pronunciation: [tɹˈiːɡə͡ʊ] (IPA)
Correct spelling for the English word "trego" is [tɹˈiːɡə͡ʊ], [tɹˈiːɡəʊ], [t_ɹ_ˈiː_ɡ_əʊ] (IPA phonetic alphabet).