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.
The human liver that performs over 300 functions has the ability to regenerate itself. The marvel of liver can be gauged from the fact that just 25% of liver tissue is enough to renew itself. So, even after removing half of someone's liver, the remaining part can regenerate to standard size of the liver.