The Collaborative International Dictionary of English v.0.48:
Unthrift \Un"thrift`\, n. 1. Want of thrift; unthriftiness; prodigality. [1913 Webster] 2. An unthrifty person. [Obs.] --Dryden. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Unthrift \Un*thrift"\, a. Unthrifty. [Obs.] [1913 Webster]