I gnashed my teeth
We have already witnessed this physical manifestation of deep psychological
conflict in the cabin of Walton's ship, when Victor is first recovering
from exposure to the arctic elements (Letter 4.3). A grieving Victor
gnashes his teeth at the mere thought of the Creature in 2.1.2. When we next observe the
phenomenon, it will be the Creature who gnashes his teeth in response to the
frustration of all his hopes (3.3.4
and note). The prototype for this
act is the Satan of Paradise Lost: compare VI.340.