[1] : The Collaborative International Dictionary of English v.0.48

doughty \dough"ty\ dou"ty^, a. compar. doughtier
   dou"ti^~er; superl. doughtiest. oe. duhti, dohti,
   douhti, brave, valiant, fit, useful, as. dyhtig; akin to g.
   t"uchtig, dan. dygtig, sw. dygdig virtuous, and fr. as.
   dugan to avail, be of use, be strong, akin to d. deugen, ohg.
   tugan, g. taugen, icel.  sw. duga, dan. due, goth. dugan,
   but of uncertain origin; cf. skr. duh to milk, give milk,
   draw out, or gr. ty`chh fortune. root68.
   able; strong; valiant; redoubtable; as, a doughty hero.
   1913 webster

         sir thopas wex grew a doughty swain.   --chaucer.
   1913 webster

         doughty families, hugging old musty quarrels to their
         hearts, buffet each other from generation to
         generation.                              --motley.
   1913 webster

   note: now seldom used, except in irony or burlesque.
         1913 webster
see also:
doughtier doughtiest 

[2] : WordNet (r) 2.0

doughty
     adj : resolute and without fear syn: fearless, hardy
     also: doughtiest, doughtier
see also:
fearless hardy doughtiest doughtier 

Doughty >> D Words
Doughty, definition of term: Doughty
doughty_pag1.html