(kwiv′ər) v.i.
To shake with a slight, tremulous motion; vibrate; tremble. See synonym under QUAKE, SHAKE.
—noun The act or fact of quivering; a trembling or shaking. [Prob. related to QUAVER]

(kwiv′ər) noun
A portable case or sheath for arrows; also, its contents. [<AF quiveir, OF coivre <Gmc.]

(kwiv′ər) adjective Obs.
Brisk; active; nimble. [OE cwifer-, found in cwiferlice zealously]