mettlesome

Adjective

Synonyms: game gamy gamey gritty spirited spunky

WordNet 3.0

Adjective (2)

having a proud and unbroken spirit
willing to face dangerSynonyms: game gamy gamey gritty spirited spunky

Webster's Dictionary (GCIDE)

Mettlesome \Met"tle*some\, a. Full of spirit; possessing constitutional ardor; fiery; as, a mettlesome horse. [1913 Webster] -- Met"tle*some*ly, adv. -- Met"tle*some*ness, n. [1913 Webster]