Definition of quells:
(v) :
(transitive) To subdue, put down, or silence (someone or something); to force (someone) to submit.
(v) :
(transitive) To suppress, to put an end to (something); to extinguish.
(n) :
A subduing.
(n) :
A source, especially a spring.
(n) :
An emotion or sensation which rises suddenly.
(v) :
(obsolete, transitive) To kill.