adj. 25B6; adjective
an energetic and ambitious politician : ASPIRING, determined, forceful, pushy, enterprising, motivated, enthusiastic, energetic, zealous, committed, purposeful, power-hungry; informal go-ahead, go-getting.
he was ambitious to make it to the top : EAGER, determined, intent on, enthusiastic, anxious, hungry, impatient, striving.
an ambitious task : DIFFICULT, exacting, demanding, formidable, challenging, hard, arduous, onerous, tough; archaic toilsome.
laid-back.