The word "rickett" is commonly misspelled as "rickets", which refers to a disease caused by a lack of Vitamin D. The correct spelling of "rickett" may be confusing as it ends with a double "t". However, this spelling can be explained using the International Phonetic Alphabet (IPA) transcription /ˈrɪkɪt/. The final "t" represents the unaspirated sound of the letter "t", which is pronounced as a light tapping of the tongue against the roof of the mouth without a release of breath.