ˌüblēˈet noun
( -s )
Etymology: French, from Middle French, from oublier to forget (from Old French oblider, from — assumed — Vulgar Latin oblitare, from Latin oblitus, past participle of oblivisci to forget) + -ette — more at oblivion
: a dungeon with an opening only at the top and often a concealed pit below the floor
human animals thrust away in the oubliettes — V.L.Parrington