ambitious

Having or showing ambition; wanting a lot of power, honor, respect, superiority, or other distinction.

an ambitious person

someone's ambitious nature

Very desirous

30 June 2019, Sam Wallace in The Telegraph, Manchester United must shape Aaron Wan-Bissaka into a £50m all-rounder - but there is no hiding place at Old Trafford Now he is joining a club ambitious to return to a model of dominating games and attacking opposition.

We were soon in the midst of the rapids, which were more swift and tumultuous than any we had poled up, and had turned to the side of the stream for the purpose of warping, when the boatmen, who felt some pride in their skill, and were ambitious to do something more than usual

Resulting from, characterized by, or indicating, ambition

an ambitious project

an ambitious style

Hard to achieve.

A “moving platform” scheme[…]is more technologically ambitious than maglev trains even though it relies on conventional rails. Local trains would use side-by-side rails to roll alongside intercity trains and allow passengers to switch trains by stepping through docking bays. This set-up solves several problems […]. Stopping high-speed trains wastes energy and time, so why not simply slow them down enough for a moving platform to pull alongside?