Pronunciation: [sˈɛd͡ʒɔ͡ɪn] (IPA)
Correct spelling for the English word "sejoin" is [sˈɛd͡ʒɔ͡ɪn], [sˈɛdʒɔɪn], [s_ˈɛ_dʒ_ɔɪ_n] (IPA phonetic alphabet).