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"