封關 [－关]

Jyutping fung1 gwaan1
Pinyin fēng guān

Definitions (粵典–words.hk)
  1. 動詞
    封閉邊​境​嘅​關​卡​；​增加​對​跨境​移​動​嘅​限制
    to close borders
  2. 反義詞
    開關
Definitions (Wiktionary)
  1. verb
    to close the gate to a city
  2. verb, broadly
    to close borders