The spelling of the word "un abler" may seem unusual, but it is actually derived from the French word "un habile" meaning "an able person". The prefix "un" means "not" and the word "abler" is pronounced /eɪblər/ in IPA phonetic transcription, meaning "having the ability to do something". Therefore, "un abler" means "not able". While the spelling may appear odd, it is important to keep in mind the word's etymology and meaning.