Brotrothed 

Engaged to be brothers in law. Both parties are brotrothed to one another.

Cillian is marrying my sister, he and I are brotrothed.

Brotrothed by Engaged as hell! November 18, 2011

betrothed 

to promise for marriage

Tom is betrothed to Sara and they are getting engaged in 3 days.

betrothed by writer346 June 11, 2006

betrothed 

to be betrayed by plant called cannabis; being way too high.

iv been betrothed!

betrothed by vibrantkittencatcher June 9, 2010