shiver · verb I /ˈʃɪv.ər/
shiver
B2 to shake because you are cold or frightened
Dictionary examples:
She shivered from the cold.
The poor dog - it's shivering!
Learner example:
She was shivering not only because of the cold, but also because she had no idea what she was going to tell him. (First Certificate in English; B2; Spanish)
shiver · noun C /ˈʃɪv.ər/
shiver
C2 a shaking of your body because you are cold, ill, or frightened
Dictionary example:
"The temperature is down to 12 degrees," she said with a shiver.
Learner example:
No sooner had she open this letter than she felt a shiver of fear. (Certificate of Proficiency in English; C2; French)
send shivers/a shiver down your spine
C2 to make you feel afraid or excited
Dictionary example:
The sound of his voice sent shivers down my spine.
Learner example:
Simply looking at her sent shivers down his spine - there was the love of his life, the dearest woman on good old Earth, that he's never met before. (Certificate of Proficiency in English; C2; Polish)