Merriam-Webster's Collegiate® Dictionary, 11th Edition
WORTH
I. intransitive verb
Etymology: Middle English, from Old English weorthan; akin to Old High German werdan to become, Latin vertere to turn, Lithuanian versti to overturn, Sanskrit vartate he turns Date: before 12th century become ,
II. adjective
Etymology: Middle English, from Old English weorth worthy, of (a specified) value; akin to Old High German werd worthy, worth Date: before 12th century having monetary or material value, estimable ,
III. noun Date: before 12th century
1. monetary value , the equivalent of a specified amount or figure , the value of something measured by its qualities or by the esteem in which it is held ,
3. moral or personal value , merit , excellence , wealth , riches ,
IV. preposition
Date: 13th century
1. equal in value to, having assets or income equal to, deserving of