The Collaborative International Dictionary of English v.0.48:

dynamical \dynamical\ adj. [Narrower terms: can-do; driving;
   energizing, energising, kinetic; forceful, slashing,
   vigorous; projectile; propellant, propellent, propelling,
   propulsive; renascent, resurgent; self-propelled,
   self-propelling; high-octane, high-powered, high-power,
   high-voltage]
   [WordNet 1.5] Dynamically \Dy*nam"ic*al*ly\, adv.
   In accordance with the principles of dynamics or moving
   forces. --J. Peile.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

can-do \can-do\ adj.
   having an eager willingness to accept and overcome
   challenges; as, a can-do kind of person; the city's
   indomitable optimism and can-do spirit. [slang]
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

can-do
    adj 1: marked by a willingness to tackle a job and get it done;
           "a can-do kind of person"; "the city's indomitable
           optimism and can-do spirit"