barracks
Concise Oxford English Dictionary © 2008 Oxford University Press:
barracks/ˈbarəks/
▶plural noun [often treated as sing.] a large building or group of buildings used to house soldiers.
– origin C17: barrack from Fr. baraque, from Ital. baracca or Sp. barraca ‘soldier's tent’.
'barracks' also found in these Oxford entries:

