私聊

sīliáo
(computing) to chat privately; private chat

CEDICT

computing

Entry Composition

1 私 sī
  1. personal
  2. private
  3. selfish
2 聊 liáo
  1. (coll.) to chat
  2. (literary) temporarily; for a while
  3. (literary) somewhat; slightly
  4. (literary) to depend upon