All 5 Uses

quell
in
Native Speaker
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I asked her not to make a scene of it, and I could see that she was about to shout out but then just as quickly she quelled herself-a trick perhaps that she had gleaned from me-and whispered sharply that if I wanted to wait I had better be willing to talk about adoption again.†

quelled = stopped or suppressed
And there was a serenity to her expression which I could not decide on, whether it was the face of someone simply a little tired or quelling a sadness.†

quelling = stopping or suppressing
And leaving right then would also serve to quell any suspicions, at least at the level we were working.†
*
Quell the old tongue, loosen the lips.†
I realize that the men and Sherrie want to quell the notion.†

Definitions:

(1) (quell)
suppress or stop completely
(2) (meaning too rare to warrant focus)
While quell still means to suppress or stop, in Shakespeare's time, it had a more violent connotation--often meaning to murder or to eliminate someone or something.