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back·bone

backbone

 
pronunciation:
baek bon
features:
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part of speech: noun
definition 1: the row of bones that runs along the center of the back; spine.
synonyms:
back, spinal column, spine
similar words:
vertebrae
definition 2: courage under pressure; the quality of not giving in.
She showed real backbone in standing up to the bully.
synonyms:
character, grit, guts
similar words:
courage, determination, nerve, resolve, strength
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See
  invertebrate, skeleton