* Formal: "The doctor diagnosed her with tonsillitis and prescribed antibiotics."
* Informal: "I've been feeling awful with this tonsillitis – my throat feels like sandpaper!"
* Descriptive: "The intense pain and fever were clear signs of his severe tonsillitis."
* Medical: "Tonsillitis is an inflammation of the tonsils, often caused by a viral or bacterial infection."
Remember, the best way to use "tonsillitis" in a sentence depends on the context and the tone you want to convey.