The phrase "am sparing" generally refers to being cautious or frugal in spending, usage, or dispensing of something. The opposite of being sparing is being extravagant, generous, or lavish. Some antonyms of "am sparing" are squandering, wasting, profuse, prodigal, extravagant, free-handed, and profligate. When someone is sparing, they are often trying to conserve, ration, or limit their usage of something. But when someone is the opposite of sparing, they tend to be excessive, abundant, or extravagant with the same thing for which someone else would be sparing. The choice between sparing and lavish depends on the resources, goals, and contexts of an individual.