壁壘森嚴 [－垒－严]

Jyutping bik1 leoi5 sam1 jim4
Pinyin bì lěi sēn yán

Definitions (CC-CEDICT)
  1. closely guarded
  2. strongly fortified
  3. sharply divided
Definitions (Wiktionary)
  1. phrase, idiomatic
    strongly fortified
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）