Final answer:
The phrase "an indefinable air of prosperous thrift" suggests the couple dresses in a manner that conveys financial wisdom and success without excess or extravagance. Their style likely shows quality and good taste.
Step-by-step explanation:
When the phrase is used that a couple had "an indefinable air of prosperous thrift," it suggests that they have a way of dressing that manages to convey success and good financial management without appearing extravagant or excessively lavish.
The phrase "an indefinable air of prosperous thrift" suggests the couple dresses in a manner that conveys financial wisdom and success without excess or extravagance. Their style likely shows quality and good taste.
Their clothing choices likely reflect quality and good taste, perhaps leaning towards classic styles that are not overtly expensive but still look sophisticated. Thrift here does not mean cheap or poorly made; rather, it signifies a smart approach to consumption, finding value and embodying a look of comfortable living within ones means.