外剛內柔 [－刚内－]

Jyutping ngoi6 gong1 noi6 jau4
Pinyin wài gāng nèi róu

Definitions (CC-CEDICT)
  1. soft on the inside despite one's hard shell
  2. appearing tough on the outside as to mask one's inner vulnerability
  3. also written 內柔外剛|内柔外刚[nei4 rou2 wai4 gang1]