Correct spelling for the English word "forcefuls" is [fˈɔːsfə͡lz], [fˈɔːsfəlz], [f_ˈɔː_s_f_əl_z] (IPA phonetic alphabet).
The word "forcefuls" is a plural noun form of the word "forceful". However, "forcefuls" is not a recognized English word, and it does not have a specific etymology because of its non-standard usage.