the scientific word that means difficult swallowing is " Dysphagia " ..
The word root for dysphagia is "dys-" which means difficult or impaired, and "phag-" which relates to eating or swallowing. Dysphagia is a medical term that refers to difficulty in swallowing.
The word, masticate, means to chew, as in "Masticate (chew) your food well before swallowing."
'Intractable' means difficult to manipulate, or hard to manage.
Aphasia
The word uneasy means not easy. The word easy means not hard.
The word that means difficult to get along with is "abrasive." It describes someone who is harsh or unpleasant in personality, making it challenging to interact with them.
It is hard to take something in such as bad news.
Hamper
not often means seldom
Endure is the word. It means suffer (something painful or difficult) patiently.
The word you're looking for is "rugged." It describes terrain that is rough, uneven, and difficult to navigate.
Crackjaw means a word or a phrase that is difficult to pronounce.