verb. Present participle of function.

adjective. Functional, working

noun. Action of the verb function.

noun. Manner by which something functions; the workings.

adjective. performing or able to perform its regular function

noun. process or manner of functioning or operating

"After they removed her pancreas, they extracted its islet cells and implanted them into her left forearm, creating what they call a functioning pancreas in her arm."

functional  operative  running  up  working  

physical process  process  

malfunctioning  

act  acting  action  active  activism  

function