衰減

衰减
shuāijiǎn
  1. to weaken
  2. to attenuate

CEDICT

Entry Composition

1 衰 shuāi (bound form) to decay; to decline; to wane
2 減 jiǎn
  1. to lower
  2. to decrease
  3. to reduce
  4. to subtract
  5. to diminish