The phrase "wast one family" can be replaced with several synonyms that convey the same meaning. It can be substituted with "single-unit family," which refers to a family consisting of only one household or a "sole family," which indicates the only family in a particular community. Another synonym for "wast one family" can be "nuclear family," which means a family unit consisting of parents and children only. "Small family" is also a possible replacement, emphasizing the family size rather than its individuality. Additionally, "solitary family" may be used to indicate a family living alone with no nearby relatives or neighbors. All these synonyms can be used interchangeably, depending on the intended context and preference.