noun
the quality or state of being thrifty; frugality in the expenditure of money or resources
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Her thriftiness was evident in the way she carefully budgeted and saved every penny.
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I admire your thriftiness when it comes to finding great deals and discounts.
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His thriftiness game is on point - he knows all the best places to score cheap stuff.
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The thriftiness of nature is seen in how every resource is efficiently used and recycled in the ecosystem.