Capable of or characterized by a high or excellent level of performance or efficiency.
Characterized by a level of performance or efficiency that is adequate for or exceeds the expectations of end users.
Of or relating to performance.
Capable of working successfully
Able to live on its own (as for a newborn).
Able to be done, possible, practicable, feasible.
Able to live and develop.
An organism that is able to live and develop.