Shivering
Part of speech: verb
Definition: To tremble or shake, especially when cold or frightened.
Trembling
Part of speech: verb
Definition: To shake, quiver, or vibrate.
Example sentence: I listen to my political rivals sometimes with fear and trembling, sometimes with awe, sometimes with near panic, but always with a curiosity of nuances, curiosity for the language, curiosity for the story behind the 'impossible' position.