connive
Connive (verb) means to work together with others in secret to do something wrong.
Etymology
From French conniver (“to ignore and thus become complicit in wrongdoing”), or directly from its etymon Latin con(n)īvēre (“close or screw up the eyes, blink, wink; overlook, turn a blind eye, connive”) (perhaps alluding to two persons involved in a scheme together winking to each other), from con- (prefix indicating a being or bringing together of several objects) + *nīvēre (related to nictō (“to blink, wink”), from Proto-Indo-European *kneygʷʰ- (“to bend, droop”)).