Spine
来自Big Physics
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late Middle English: shortening of Old French espine, or from Latin spina ‘thorn, prickle, backbone’.
wiktionary
From late Middle English spyne, from Old French espine (French épine) or its source, Latin spīna(“a thorn; a prickle, spine; the backbone”). Doublet of spina.
etymonline
spine (n.)
c. 1400, "backbone," later "thornlike part" (early 15c.), from Old French espine "thorn, prickle; backbone, spine" (12c., Modern French épine), from Latin spina "backbone," originally "thorn, prickle" (figuratively, in plural, "difficulties, perplexities"), from PIE *spe-ina-, from root *spei- "sharp point" (see spike (n.1)). Meaning "the back of a book" is first attested 1922.
