From gemo; a load (as filling), i.e. (specially) a cargo, or (by extension) wares -- burden, merchandise.
see GREEK gemo
a. the lading or freight of a ship, cargo, merchandise conveyed in a ship: Acts 21:3 (Herodotus 1, 194; (Aeschylus), Demosthenes, others; (in the Sept. the load of a beast of burden, Exodus 23:5; 2 Kings 5:17)).
b. any merchandise: Revelation 18:11f.