that cannot be cured must be endured.
That cannot be cured, must be endured.
^ capitalizing T in that^ adding a comma after cured to let the reader know enduring is a second/different act.
You are defending the authors points.
Answer: A verb is a word that in syntax conveys an action, an occurrence, or a state of being. In the usual description of English, the basic form, with or without the particle to, is the infinitive. In many languages, verbs are inflected to encode tense, aspect, mood, and voice.
Explanation: Hope this helped