The word "arnall" is a rarely used adjective that means wasteful or useless. Its spelling can be explained using the International Phonetic Alphabet (IPA), which is a system of phonetic notation that uses symbols to represent speech sounds. In IPA, "arnall" is pronounced as /ɑːˈnæl/, where the "a" is pronounced as "ah", the "n" is pronounced as "en", and the "l" is pronounced as "el". The double "l" at the end of the word indicates the length of the sound.