可逆

kěnì
  1. reversible
  2. (math.) invertible

CEDICT

math

Entry Composition

1 可 kě
  1. (prefix) can; may; able to; -able
  2. to approve; to permit
  3. to suit
  4. (particle used for emphasis) certainly; very
  5. but; however
2 逆 nì
  1. contrary
  2. opposite
  3. backwards
  4. to go against
  5. to oppose
  6. to betray
  7. to rebel