Correct spelling for the English word "Corneter" is [kˈɔːnɛtə], [kˈɔːnɛtə], [k_ˈɔː_n_ɛ_t_ə] (IPA phonetic alphabet).
The word "corneter" is derived from the French word "cornet", which ultimately traces back to the Latin word "cornū" meaning "horn". In English, a "cornet" refers to a musical instrument resembling a trumpet, and a "corneter" is someone who plays the cornet. The term "cornet" itself came into English from French in the late 14th century.