You searched for: “aphagopraxia
aphagopraxia (s), aphagopraxias (pl) (nouns)
The loss of the ability to swallow: "The ailment of aphagopraxia may be caused by the narrowing of the esophagus as a result of a physical ailment; such as, cancer or injury."

"Aphagopraxia is also defined as a disturbance to the nervous control of the swallowing mechanism by a stroke or some kind of motor neurone disease."