The spelling of the word "COIS" may seem difficult to decipher at first glance, but with the help of the International Phonetic Alphabet (IPA), it becomes clear. The word is pronounced as /kɔɪs/ and refers to the Irish word for "footpath" or "pathway." The spelling of this word is derived from the Irish language's rich history and unique phonetics. While it may be challenging to spell, mastering the pronunciation of "COIS" can be a fun and rewarding learning experience for language enthusiasts.