c. 1600, "shut one's eyes to something one does not like but cannot help," from Latin connivere, also conivere "to wink," hence, figuratively, "to wink at (a crime), be secretly privy," from assimilated form of com "with, together" (see con-) + base akin to nictare "to wink" (from PIE root *kneigwh-; see nictitate). From 1630s as "conceal knowledge (of a fault or crime of another); give silent encouragement to a culpable person." From 1797 as "be in secret complicity." Related: Connived; conniving.