solemnize
Concise Oxford English Dictionary © 2008 Oxford University Press:
solemnize /ˈsɒləmnʌɪz/ (or solemnise /ˈsɒləmnʌɪz/)
▶verb duly perform (a ceremony, especially that of marriage).
■ mark with a formal ceremony.
– derivatives
solemnization noun.
solemnization noun.
'solemnize' also found in these Oxford entries:

