He declared that she was congenitally incapable of forming a single letter worthy of the least of Milton’s words; but she persisted; and again he suddenly threw himself into the task of teaching her with a combination of stormy intensity, concentrated patience, and occasional bursts of interesting disquisition on the beauty and nobility, the august mission and destiny, of human handwriting.
There are no more uses of "congenital" in the play.
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It was a congenital heart defect.
It was true what I’d heard, that his heart was congenitally diseased, and he was now in urgent need of a transplant.