A shake, quiver, or vibration.
To shake, quiver, or vibrate.
To fear; to be afraid.
The act of whirling round and round; rapid rotation.
A sensation of whirling and loss of balance, caused by looking down from a great height or by disease affecting the inner ear.
A disordered or imbalanced state of mind or things analogous to physical vertigo; mental giddiness or dizziness.