(n.) Oversight; watch; inspection; supervision.

accountability ambuscade ambush ambushment auspices blind booby trap bossing bugging care charge cloak-and-dagger work counterespionage counterintelligence custodianship custody eagle eye electronic surveillance espial espionage eye following guard guardedness guardianship intelligence intelligence work intendance invigilation jurisdiction lookout lurking hole military intelligence monitoring observance observation oversight peeled eye proctoring prudence qui vive reconnaissance responsibility scrutiny secret police secret service shadowing sharp eye spying stakeout stalking-horse stewardship superintendence supervision tab tailing tout trailing trap vigil vigilance wariness watch watch and ward watchful eye watchfulness watching weather eye wiretap wiretapping