Pronunciation: [wɒst ɪn ˈɒfɪŋ] (IPA)
Correct spelling for the English word "wast in offing" is [wɒst ɪn ˈɒfɪŋ], [wɒst ɪn ˈɒfɪŋ], [w_ɒ_s_t ɪ_n ˈɒ_f_ɪ_ŋ] (IPA phonetic alphabet).