Correct spelling for the English word "Expariating" is [ɛkspˈaɹɪˌe͡ɪtɪŋ], [ɛkspˈaɹɪˌeɪtɪŋ], [ɛ_k_s_p_ˈa_ɹ_ɪ__ˌeɪ_t_ɪ_ŋ] (IPA phonetic alphabet).
The word "expiating" comes from the Latin word "expiare", which means "to atone for" or "to make amends". The Latin root "ex-" indicates "out, away from", and "piare" derives from "pius", meaning "pious" or "dutiful". Over time, the word "expiate" evolved in English to "expiating", which refers to the act of making up for a wrongdoing or seeking forgiveness for a sin.