consummation
noun /ˌkɒnsəˈmeɪʃn/
  /ˌkɑːnsəˈmeɪʃn/
 [countable, uncountable]- the act of making a marriage or relationship complete by having sexTopics Life stagesc2
- the fact of making something complete or perfect- The paintings are the consummation of his life's work.
 
Word Originlate Middle English: from Latin consummatio(n-), from the verb consummare, from con- ‘altogether’ + summa ‘sum total’, feminine of summus ‘highest, supreme’.