backbone

Definitions

The series of vertebrae extending from the skull to the pelvis, forming the main support of the body.

The chief support or essential structural component of a system or organization.

Strength of character, courage, or firmness of purpose.

Examples

Agriculture is the backbone of the country's economy.

The steel frame serves as the backbone of the entire skyscraper.

Synonyms

spine vertebral column spinal column courage grit fortitude determination

Antonyms

cowardice timidity weakness spinelessness irresolution fearfulness pusillanimity