Both Uses

quiver
in
The Magician's Nephew
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Sometimes it would move mysteriously when there was no wind blowing: I think that when this happened there were high winds in Narnia and the English tree quivered because, at that moment, the Narnia tree was rocking and swaying in a strong south-western gale.†
Chpt 15 *
Then Jadis spoke; not very loud, but there was something in her voice that made the whole room quiver.†
Chpt 6

Definition:

to shake or tremble slightly