the quality of being adequately or well qualified physically and intellectually
"The hiring manager praised his competency, noting that he was both physically strong enough to lift heavy equipment and intelligent enough to troubleshoot complex machinery."
A sufficient supply (of).
"The hospital's competency in surgical supplies was verified by an external audit to ensure patient safety."
The word competency comes from the Late Latin competentia, which originally referred to a state of being suitable or fitting together with something else. It entered English as a doublet of the related term "competence," sharing the same root but developing distinct nuances over time.