“to destroy by separating into parts which cannot be reunited, as by burning or eating,” hence “destroy the substance of, annihilate,” from Old French consumer “to consume” (12c.) and directly from Latin consumere “to use up, eat, waste,” from assimilated form of com-, here probably an intensive prefix (see com-), + sumere “to take,” from sub- “under” (see sub-) + emere “to buy, take” (from PIE root *em- “to take, distribute”).
(Etymology Online)
noun
noun: consumerism
1.the protection or promotion of the interests of consumers.
2.DEROGATORY the preoccupationof society with the acquisition of consumer goods.
(Google Dictionary)