Sindarin 

bethragas

 noun. adultery, (lit.) marriage-breakage

The form is derived from vestaracië, as originally created by Helge Fauskanger for his translation of the biblical New Testament into Neo-Quenya.

Elements

WordGloss
best“marriage, matrimony, wedlock, wedding”
rag-“to break asunder, burst, *break, shatter”
Sindarin [Parf Edhellen] Group: Eldamo - neologism/reconstructions. Published by