The spelling of the word "gainlyness" is derived from its root word "gainly" which means graceful or well-proportioned. The pronunciation of "gainlyness" is /ˈɡeɪnlinəs/, with stress on the first syllable. The root word "gainly" is pronounced as /ˈɡeɪnli/, with stress on the first syllable, and the addition of the suffix "-ness" indicates a state or condition of being graceful or well-proportioned. The spelling conforms to standard English spelling rules and demonstrates the versatility of the language in creating new words through affixation.