Definition of do-naught in English:

do-naught

noun

dialect, archaic
  • A person who does nothing, an idler, a do-nothing; (also) a person who does no good, a good-for-nothing; specifically †the devil (obsolete).

adjective

dialect, archaic, rare
  • Do-nothing.

Origin

Late 16th century; earliest use found in Richard Carew (1555–1620), antiquary and poet. In some forms from do + nought.

Pronunciation

do-naught

/ˈduːnɔːt/