Correct spelling for the English word "Irrorated" is [ˈɪɹəɹˌe͡ɪtɪd], [ˈɪɹəɹˌeɪtɪd], [ˈɪ_ɹ_ə_ɹ_ˌeɪ_t_ɪ_d] (IPA phonetic alphabet).
The word irrorated has its origins in Latin. It comes from the Latin verb irrorare, which means to sprinkle or to moisten. The word is derived from the prefix in- meaning in or on, and the root rorare meaning to sprinkle. Therefore, irrorated can be understood to mean sprinkled or moistened.