First, cordial has 2 meanings.
1. a very sweet after dinner drink, a liqueur
2. friendly, but formal and polite
Sentences for each:
I appreciate your cordial reply.
They maintain a cordial atmosphere and a friendly rapport patient.
He was doing his best to be cordial, but I could see by his face that he was skeptical. He and his neighbors had always had a cordial relationship, so he was confused when they began to ignore him.
kobe
I cordially decline your notions I cordially decline your notions
You didn't say which meaning of the word you wanted to use. Here are some sentences with different meanings.She gave us a cordial greeting and invited us inside.Then, she offered us glasses of cordial.We felt we had cordial relations with her.The Priest drank a glass or cordial. The cat knocked over the glass of cordial onto the new sofa.After I had been playing outside with my friends, I felt tired and needed a glass of cordial to cool down.The host was cordial in inviting guests.
He and his neighbors had always had a cordial relationship, so he was confused when they began to ignore him.
cordial
I would use it correctly in a sentence, of course. Thank you for asking.
Jarry use paroxysm in a sentence.\
Would not that be "Would not that be?"?
I would use the word "theory" in a sentence like this: "The scientist presented a new theory to explain the findings of the experiment."