Antonyms for Beginning (opposite meaning)
WordNet sense 1 (the point in time at which something ends):
end, endingWordNet sense 2 (time between the beginning and the end of a temporal period):
middleWordNet sense 3 (event whose occurrence ends something):
finishWordNet sense 4 (the act of finishing):
finishingFrom the ODE community, based on WordNetadd/edit