The correct spelling of the word "dowell by" is actually "dowel pin," which is a cylindrical metal or wooden rod used to reinforce joints or connect parts of a machine or furniture. The pronunciation of "dowel" is \ˈdau̯əl\, with the first syllable pronounced like "dow" and the second syllable like "el." The pronunciation of "pin" is \ˈpɪn\. Together, they form the correct spelling and pronunciation of "dowel pin."