Watchtower

['wɒtʃtaʊə] or ['wɔtʃ,taʊr]

解释:

(noun.) an observation tower for a lookout to watch over prisoners or watch for fires or enemies.

尤因整理--From WordNet

解释:

(n.) A tower in which a sentinel is placed to watch for enemies, the approach of danger, or the like.

手打:西摩