Thriftily is the adverb from thrifty: it describes DOING something in a careful, non-wasteful way with money or resources. You live thriftily, shop thriftily, manage a household thriftily. The word keeps the warm colour of thrift — it praises the person, saying they are wise and unwasteful, not that they are stingy. It is a slightly bookish word; in speech people more often say "carefully with money," "on a budget," or "cheaply" — though note that "cheaply" can suggest poor quality, which thriftily never does. A useful sense to notice: thriftily often carries a hint of skill and even pride. Someone who cooks thriftily is not just spending little; they are getting a good meal out of little, which is something to admire. It can also stretch beyond money to any resource — using water thriftily, using words thriftily.

節儉地、省著用地