connive

Short definition from Wiktionary

Verb

1. 1
   To secretly cooperate with other people in order to commit a crime or other wrongdoing; to collude, to conspire.
2. 2
   Of parts of a plant: to be converging or in close contact; to be connivent.
3. 3
   Often followed by at: to pretend to be ignorant of something in order to escape blame; to ignore or overlook a fault deliberately.
4. 4
   To open and close the eyes rapidly; to wink.