"to throw a shadow upon" (epi, "over," skia, "a shadow"), "to overshadow," is used (a) of the bright cloud at the Transfiguration, Matthew 17:5; Mark 9:7; Luke 9:34; (b) metaphorically of the power of "the Most High" upon the Virgin Mary, Luke 1:35; (c) of the Apostle Peter's shadow upon the sick, Acts 5:15 .
lit., "to shadow down," is used of the "overshadowing" (RV) of the cherubim of glory above the mercy seat, Hebrews 9:5 (AV, "shadowing").