湛深

zhànshēn
  1. (literary) advanced; profound; recondite
  2. (literary) deep; deepening
  3. (literary) to have a proficiency in; to be proficient in; to master
  4. advanced; profound; recondite
  5. deep; deepening
  6. to have a proficiency in; to be proficient in; to master

Wiktionary

Entry Composition

=1 湛 Zhàn surname Zhan
=1 湛 zhàn
  1. deep
  2. clear (water)
=2 深 shēn old variant of 深 shēn
=2 深 shēn deep (lit. and fig.)