effectivus (Quint.): sollers: ingeniosus (of an inventive mind): a creative mind, sollertia: creative power, effectio (Cic., Acad., 1, 2, 6): creative nature, rerum natura creatrix (Lucr.): every thing was brought into being by the creative power of nature, omnia sunt opera sollertis naturae: nature seems here to have taxed her creative powers to the utmost, in hoc natura, quid efficere possit, videtur experta.