The word "postholith" refers to a type of standing stone monument. Its spelling may seem unusual, but can be explained through its phonetic transcription: /pəʊstˈhəʊlɪθ/. This indicates that the first syllable rhymes with "most," followed by a short "o" sound in the second syllable. The "h" is silent, and the final syllable ends with a hard "th" sound. While the spelling may be tricky, understanding its phonetic makeup can aid in proper pronunciation.
A preputial calculus.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.