Thrift·i·ly adv.
1. In a thrifty manner.
2. Carefully; properly; becomingly. [Obs.]
A young clerk . . . in Latin thriftily them gret [greeted]. --Chaucer.
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thriftily
adv : in a thrifty manner; "a used towel that he had used and had
left thriftily on the ledge below the mirror rather
than consign to the linen basket"