desponsate
/dɛˈspɒnzɪt, -ˈspɑː-/Definitions
1. verb
to have a marriage or engagement ceremony, especially in a church, without actually getting married
“The couple decided to desponsate to make their commitment official before the wedding”
2. noun
a ceremony in which a couple declares their engagement or intention to marry, especially in a church
“The desponsate ceremony was a beautiful and intimate affair, attended by close friends and family”