海かい洋よう無む酸さん素そ事じ変へんMeaningsNoun1. Oceanic Anoxic Event; Ocean Anoxic Event; OAEKanji used海sea洋ocean無nothing酸acid素elementary事occurence変changeComposed of海かい洋ようocean; seaNoun無むnothing; naught; nought; nil; zero; un-; non-Noun酸さん素そoxygen (O)Noun事じ変へんaccident; disaster; incident; uprising; emergencyNoun