Unable Definition

ŭn-ābəl
adjective
Not able; lacking the ability, means, or power to do something.
Webster's New World
Lacking mental or physical capability or efficiency; incompetent.
Unable to walk.
American Heritage
Incompetent.
Webster's New World
Not susceptible to action or treatment.
A project unable to be financed with government funds.
American Heritage
Helpless; feeble.
Webster's New World