the compound adjective 'spine-tingling' is a modern english formation that vividly combines two concrete, physical sensations to describe an abstract emotional effect. the first element, 'spine', derives from the latin 'spina' (thorn, backbone), which metaphorically represents the core of one's physical being. the second element, 'tingling', originates from an imitative middle english verb suggesting a light, repeated ringing or prickling. when fused, the term creates a powerful somatic metaphor: the feeling of shivers running along one's backbone, effectively translating the physiological reaction to intense fear, awe, or excitement into a standalone descriptive term. this exemplifies how english builds evocative, figurative language from tangible bodily experiences.

Structure: spine (backbone) + tingling (prickling sensation) spine: from latin 'spina' meaning 'thorn, backbone'. functions as a noun root denoting the backbone or a central support. tingling: from middle english 'tinglen', a frequentative verb form related to 'tinkle'. functions as a present participle/adjective describing a slight prickling or stinging sensation.