The spelling of the word "kinner" may seem unusual, but it follows the rules of English phonetics. The pronunciation of the word is /ˈkɪnər/ with stress on the first syllable. The "-er" ending is used to indicate the occupation or the one who possesses the quality of the root word "kin", which means related by blood. Therefore, "kinner" refers to someone who is related by blood or kinship. Although it may not be a commonly used word, its spelling and pronunciation are valid in the English language.
The word "kinner" does not have a widely accepted etymology, as it is a relatively rare term. In some cases, "kinner" is used as a variant spelling of the word "kin", which refers to one's relatives or family. The word "kin" itself has Middle English and Old English roots, ultimately descending from the Proto-Germanic word "kunjan", meaning "family" or "clan". Other times, "kinner" is used as a slang or colloquial term for a child or a young person. However, its precise origin in this context is unclear.