fiancé
noun
A person engaged to be married; the future spouse of someone.
Sample sentence: My fiancé surprised me with a beautiful engagement ring.
fiancée
noun
A woman engaged to be married; the future spouse of a man.
Sample sentence: Sarah introduced her fiancée to her family during the holiday dinner.
fiancé
verb
To engage someone to be married.
Sample sentence: He decided to fiancé his longtime partner during a romantic trip to Paris.
fiancée
verb
To engage a woman to be married.
Sample sentence: Andrew eventually fiancée his girlfriend of five years in a heartfelt proposal.