Pronunciation: [labˈɔːɹɪəsliz] (IPA)
Correct spelling for the English word "laboriouslies" is [labˈɔːɹɪəsliz], [labˈɔːɹɪəsliz], [l_a_b_ˈɔː_ɹ_ɪ__ə_s_l_i_z] (IPA phonetic alphabet).