Definitions
1.verbTo demand and enforce the payment or performance of, sometimes in a forcible or imperious way."to exact tribute, fees, or obedience from someone"
2.verbTo make desirable or necessary.
3.verbTo inflict; to forcibly obtain or produce."to exact revenge on someone"
4.adjectiveMaking excessive demands; difficult to satisfy.
5.adjective(of an action, task, etc) Requiring precise accuracy, great care, effort, or attention.
6.adjective(of a person or organization) Characterized by exaction.