inundation
n. US //ˌɪnənˈdeɪʃən// UK //ˌɪnəndˈeɪʃən// in·un·da·tion
From Old French inundacion (“flood”) (French inondation), from Latin inundatio (“flood”), form of inundō (“I flood, overflow”) (English inundate). By surface analysis, inundat(e) + -ion.