Ketrakath is a word in the Romulan language which, loosely translated, refers to the concept of a 'Suicide run' or kamikaze attack. Ruanek once described it as "an attack without restraint or hope." The mad Romulan praetor, Dralath, invoked ketrakath before beginning a suicidal attack on the USS Stargazer - an attack which eventually resulted in the destruction of Dralath's ship and the deaths of its entire crew, Dralath included.
A commander who intends ketrakath will often drug his crew so they will not rebel against him or question his suicidal orders. (TOS novel: Vulcan's Heart)