When it comes to describing someone who is "prodigal with" something, there are several antonyms to consider. Some of the opposite words that come to mind include "frugal," "economical," "thrifty," and "sparing." These terms are all used to describe individuals who are careful with their spending and resources, rather than wasteful or extravagant. By contrast, being "prodigal with" something implies a lack of restraint, often to the point of excess or indulgence. Choosing the right word to describe someone's behavior in this context can help convey a more accurate picture of their habits and attitudes.