[n] a computer network that connects other computer networks
[n] (informal) fortitude and determination; "he didn't have the guts to try it"
[n] the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"
[n] a central cohesive source of support and stability; "faith is his anchor"; "he is the linchpin of this firm"
anchor, back, grit, gumption, guts, linchpin, lynchpin, mainstay, moxie, rachis, sand, spinal column, spine, vertebral column