The word Frugal describes someone who is sparing or economical with regard to money or food. It implies being careful in the use of resources, avoiding waste, and living simply. Therefore, the most fitting synonym among the options is Economical (option B).
A frugal person manages their money and resources wisely, often by being thrifty and avoiding unnecessary expenses. For example, a “frugal lifestyle” involves careful spending, and a “frugal meal” is simple and inexpensive. “Economical” similarly means careful in the use of resources and avoiding waste, especially of money or time. Option A, “Wasteful,” is an antonym, meaning using resources carelessly or extravagantly. Option C, “Luxurious,” implies great comfort and expense, which is the opposite of frugal. Option D, “Arrogant,” describes a sense of superiority, which is unrelated. Understanding “frugal” helps to describe practices and habits that prioritize saving and efficient resource management, highlighting a sensible approach to finances.