资料来源 : pyDict

精神蓬勃的;勇敢的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Mettlesome \Met"tle*some\, a.
   Full of spirit; possessing constitutional ardor; fiery; as, a
   mettlesome horse. -- {Met"tle*some*ly}, adv. --
   {Met"tle*some*ness}, n.

资料来源 : WordNet®

mettlesome
     adj 1: having a proud and unbroken spirit
     2: willing to face danger [syn: {game}, {gamy}, {gamey}, {gritty},
         {spirited}, {spunky}]