湛深 [－－]

Jyutping zaam3 sam1
Pinyin zhàn shēn

Definitions (Wiktionary)
  1. adj, literary
    deep; deepening
    (syn.) 深沉
  2. adj, literary
    advanced; profound; recondite
  3. verb, literary
    to have a proficiency in; to be proficient in; to master
    (syn.) 善用, 精通, 工于, 长于, 擅长, 精于, 長於, 熟行, 精於, 见长, 工於, 善能, 善于, 擅長, 見長, 善於, 撚手