The spelling of the word "narcotinic" follows the typical English spelling patterns, with the exception of the ending "-inic." This is because the word comes from the root word "narcotic," which refers to a substance that has a sedative effect. The "-inic" suffix is used to indicate a specific type of chemical compound, similar to the suffix "-ine" in caffeine or nicotine. The phonetic transcription for "narcotinic" is /nɑːˈkɒtɪnɪk/, with the primary stress on "nar," secondary stress on "tic," and the final syllable pronounced like "nick."