Dictionary entry

Improsperous

Webster's Dictionary 1913

Im‐pros″per‐ous (?), a. [Pref. im- not + prosperous: cf. F. improspère, L. improsper.] Not prosperous. Dryden. — Im‐pros″per‐ous‐ly, adv. — Im‐pros″per‐ous‐ness, n.