downfault

== English == === Etymology === From down- +‎ fault. === Noun === downfault (plural downfaults) (geology) A graben (area sunken relative to surrounding land). === Verb === downfault (third-person singular simple present downfaults, present participle downfaulting, simple past and past participle downfaulted) (geology) To form a fault that is sunken relative to the surrounding land.