The antonyms for the word "ex-pending" are "saving", "hoarding", "conserving", "preserving", and "amassing". While expending means to use up or consume, its antonyms suggest the opposite - to hold back, contain or store. Saving, for instance, implies the act of reserving and keeping something for later use. If you save, you expend less. Conserving refers to the idea of using resources more judiciously so as to avoid waste. And amassing suggests the accumulation of resources or wealth over a period without expending too much along the way. Knowing the antonyms of a word is important as it helps to understand the range of meanings a word can take on.