Complicit means being involved in wrongdoing, usually by helping or by knowingly allowing it. Complacent means being comfortably satisfied and insufficiently alert — pleased with how things are when you should be watching. One implies guilt, the other implies inattention.
The core difference
Both are criticisms, but of very different failings.
- complicit — party to wrongdoing: complicit in the cover-up.
- complacent — uncritically satisfied: complacent about security.
Where they meet
Silence can be described either way, which is where the confusion lives. Staying quiet because you benefit is complicit; staying quiet because you assumed everything was fine is complacent. The choice of word makes a specific accusation, so it is worth being deliberate about which one you mean.
Related word
Complicity is the noun for the first. Complaisant — a third similar word — means eager to please, and is now rare enough that using it invites being read as a misspelling of complacent.
Frequently asked questions
Which word means being part of wrongdoing?
Complicit. Complacent means being uncritically satisfied and insufficiently alert.
Can you be both?
Yes, and the distinction still matters — complacency describes not noticing, complicity describes taking part or knowingly allowing.
What does complaisant mean?
Eager to please or accommodating. It is rare now and easily mistaken for a misspelling of complacent.