积淀

積澱
jīdiàn
  1. deposits accumulated over long periods
  2. fig. valuable experience, accumulated wisdom

CEDICT

Entry Composition

1 积 jī
  1. to amass; to accumulate; to store up
  2. (math.) product (the result of multiplication)
  3. (TCM) constipation; indigestion
=2 淀 diàn (bound form) shallow lake (usu. in place names)
=2 淀 diàn to form sediment; to precipitate