Pronunciation: [ɡˈe͡ɪntɜːnɪŋ] (IPA)
Correct spelling for the English word "gainturning" is [ɡˈe͡ɪntɜːnɪŋ], [ɡˈeɪntɜːnɪŋ], [ɡ_ˈeɪ_n_t_ɜː_n_ɪ_ŋ] (IPA phonetic alphabet).