emersion
n.
"reappearance, act of emerging," 1630s, noun of action from past participle stem of Latin emergere "to rise out or up" (see emerge). Originally of eclipses and occultations.
〔李〕[e-;mers;-ionn.] n.浮现，出现； 发生，显露 ←merg,mers (L mergere,mersum)=to sink 沉
〔蒋〕[merg=dip，sink沉，没(merg也作mers)，-ion名词后缀] 突然出现的情况;突然事件，意外之变;紧急情况