The definition of maladroit is awkward or showing a lack of skills. An example of a maladroit person is an employee who cannot accomplish the simplest tasks of the job. noun
The historic view is that once brain cells are damaged or killed, they do not regenerate. Yet, research over the last 20 years is showing substantial evidence of cell regeneration, particularly in those under 40 year of age.
Newts, salamanders, and sea stars can replace lost limbs; skates, rays, and sharks can regenerate kidneys; some kinds of worms can even grow into two new, separate individual worms if they're cut in half. Mammals, on the other hand, have very limited regeneration abilities. In humans, the only organ known to truly regenerate is the liver; young children also can sometimes crudely regenerate lost fingertips. But if you lose a limb, an eye, an ear, or any other part, you're out of luck.