Correct spelling for the English word "coner" is [kənˈɜː], [kənˈɜː], [k_ə_n_ˈɜː] (IPA phonetic alphabet).
The word coner is derived from the Old French term corner which originated from the Latin word cornerium. In Latin, cornerium referred to a street or a building situated at a street corner. Over time, this term was borrowed into Middle English as corner. The word coner specifically relates to the occupation of making cones or being in the business of selling cones, and it is formed by adding the suffix -er to cone.