Word Origin & History
1680s, "temporary hut for soldiers during a siege," from Fr. barraque, from Sp. barraca (1249) "soldier's tent," lit. "cabin, hut," perhaps from barro "clay, mud," which is probably of Celt-Iberian origin. Meaning "permanent building for housing troops" (usually in plural) is attested from 1690s.
plural, and usual, form of barrack