substantial

a.相当的；牢固的；主要的

subsequently, subservience, subservient, subserviently, subside, subsidence, subsidiary, subsidization, subsidization, subsidisation, subsidize, subsidize, subsidise, subsidy, subsist, subsistence, subsistence crop, subsistence level, subsoil, subsonic, substance, substandard, substantially, substantiate, substantiation, substantive, substantively, substation, substitute, substitute for, substitute...for, substitution, substratum, substructure, subsume, subtenancy, subtenant, subtend, subterfuge, subterranean, subtitle, subtle,