quaking

quake  (kwk)

intr.v. quaked, quak·ing, quakes

1. To shake or tremble, as from instability or shock.

2. To shiver, as with cold or from strong emotion. See Synonyms at shake.

n.

1. An instance of quaking.

2. An earthquake.

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[Middle English quaken, from Old English cwacian.]

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quaky adj.

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quaking [ˈkweɪkɪŋ]

adj

unstable or unsafe to walk on, as a bog or quicksand a quaking bog quaking sands