The antonyms for the word "un sparing" include generous, lavish, bountiful, abundant, profuse, ample, and liberal. These words imply a spirit of giving and abundance, as opposed to the withholding or restriction suggested by the word "un sparing." Generous and lavish describe someone who gives freely and abundantly, with no regard for cost or personal loss. Bountiful and ample convey a sense of plenty, indicating that there is an abundance of something available. Profuse suggests a great amount or quantity, while liberal implies a willingness to give or share freely. By using antonyms for "un sparing," one can convey a sense of generosity and abundance, rather than scarcity or withholding.