Which word means not planning for the future or being thriftless?

The term "improvident" refers to a lack of foresight or planning for the future, especially when it comes to financial matters. It describes a person who is careless with their resources, failing to prepare for future needs or emergencies. This characteristic reflects a tendency to live for the moment without considering the consequences or implications for the future.

In the context of the question, you're looking for a word that encapsulates the idea of acting without sufficient planning or foresight, which perfectly aligns with the definition of "improvident." This understanding of the term is essential for recognizing behaviors or attitudes that may lead to financial difficulties later on, emphasizing the importance of prudence in planning and resource management.