The correct spelling of the word "Arthritical" is actually "Arthritic." The phonetic transcription of this word is /ɑrˈθrɪtɪk/. The "h" is silent in this word, hence why it is spelled "arthritic" rather than "arthritical." Arthritis is a common condition that affects the joints, causing pain and inflammation. It is important to use the correct spelling when discussing this condition in medical or everyday contexts.
Pert. to the joints or to the gout.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.