shiver

(noun) a reflex motion caused by cold or fear or excitement. Synonyms: tremble, shake.

(noun) an almost pleasurable sensation of fright. Synonyms: frisson, chill, quiver, shudder, thrill, tingle. Example: "A frisson of surprise shot through him."

(verb) tremble convulsively, as from fear or excitement. Synonyms: shudder, throb, thrill.

(verb) shake, as from cold. Synonyms: shudder. Example: "The children are shivering--turn on the heat!."