blockhouse

n 1 concrete structure strengthened to give shelter from gun-fire, and with openings for defenders to shoot from 碉堡. 2 (US) (formerly) wooden fort with openings in the walls for defenders to shoot from （旧时）木堡（防守者可通过其墙孔向外射击）.

blisteringly, blithe, blithely, blithering, blitz, blizzard, bloated, bloater, blob, bloc, block, block and tackle, block diagram, block letter (also block capital), block vote (also card vote), block-buster, block-busting, blockade, blockage, blockhead, bloke, blond, blood, blood bank, blood count, blood feud, blood group (also blood type), blood orange, blood pressure, blood sports, blood test, blood transfusion, blood-bath, blood-brother, blood-curdling, blood-donor, blood-heat, blood-letting, blood-lust, blood-money,