The antonyms for the word "being plentiful" are scarce, insufficient, rare, limited, and few. These words indicate the opposite of abundance, indicating a scarcity or shortage of something. For instance, when a resource is scarce, it means that it's hard to come by, or there's very little of it available. Similarly, when something is insufficient, it means that there's not enough of it to meet the demands or needs, and when something is rare, it indicates that it's uncommon or not found easily. Thus, understanding antonyms for words like "being plentiful" is crucial for effective communication and precise expression.