Antonyms for "be sparing" include "be generous," "be lavish," "be prodigal," "be extravagant," and "be extravagant." To be sparing is to use or give something in a limited or small amount, while being generous is to give or use something in abundance or large amounts. The opposite of being economical with resources is being wasteful or profligate. When we are lavish with our resources, we are not saving or reserving anything for later. Being prodigal means spending excessively or recklessly, often leading to financial ruin. Extravagance is characterized by excess or extravagance, often to the point of absurdity or waste.