偵伺

侦伺
zhēnsì
  1. (often derogatory) to lie and wait for; to be on watch for
  2. to lie and wait for; to be on watch for

Wiktionary

Entry Composition

1 偵 zhēn
  1. to scout
  2. to spy
  3. to detect
=2 伺 cì used in 伺候 cìhou
=2 伺 sì
  1. to watch
  2. to wait
  3. to examine
  4. to spy