fiance
fi.an.ce \.fe--.a:n-'sa-, fe--'a:n-.sa-\ n [F, fr. MF, fr. pp. of fiancer to promise, betroth, fr. OF fiancier], fr. fiance promise, trust, fr. fier to trust, fr. (assumed) VL fidare, alter. of L fidere - more at BIDE : a man engaged to be married