Arthrombole is a medical term that refers to the formation of a blood clot within a joint. The word is pronounced /ɑrθrəmboʊl/. The spelling of this word is based on its Greek roots 'arthro' meaning joint, and 'embolos' meaning a plug or stopper. The combination of the two roots gives the word its present spelling as 'arthrombole'. It is essential to use correct spelling in medical terms, as it can affect the accuracy of diagnoses and treatments.