收敛

收斂
shōuliǎn
  1. to dwindle; to vanish; to make vanish
  2. to exercise restraint; to curb (one's mirth, arrogance etc)
  3. to astringe
  4. (math.) to converge

CEDICT

math

Entry Composition

1 收 shōu
  1. to receive
  2. to accept
  3. to collect
  4. to put away
  5. to restrain
  6. to stop
  7. in care of (used on address line after name)
2 敛 liǎn
  1. (literary) to hold back
  2. (literary) to restrain; to control (oneself)
  3. to collect; to gather
  4. Taiwan pr. liàn