The word "backbone" often refers to a person's strength, courage, and resilience. It represents the ability to stay strong, not giving up easily, and persevering through challenges. Full definition
The city's strong backbone of public transportation makes getting around a snap. (ordinarytraveler.com)
I love neutrals as I believe they are a good backbone for any room however, without color the room looks flat and boring. (theinspiredroom.net)
Our business is characterized by our focus on delivering the best possible user experience and building the most powerful, robust technology backbone in the industry. (seedinvest.com)