The correct spelling of the word "mechem" is actually "mecham." The reason for this is due to the English language's irregular spelling rules. In the International Phonetic Alphabet (IPA) transcription, the word would be written as /ˈmɛkəm/. The "ch" sound is actually made up of two different phonemes, /k/ and /h/, which is why the spelling can be confusing. Remembering to double check and double-checking the spelling can help ensure the correct representation of this word.