lifeblood

Even with the tweak, the policy effectively shutters the H-1B pipeline that, for three decades, powered the American dream for millions of Indians and, more importantly, supplied the lifeblood of talent to US industries.

He wrote: “Let us take care that we allow that tree to grow and blossom as it feeds on the lifeblood of Charles J. Kirk in the years to come.”

"This is injecting the government directly into the lifeblood of a major corporation's decision making."

But it's one thing to ban fishing - it would be quite another to completely stop the busy river traffic which delivers passengers as well as goods, and provides lifeblood for much of central China's economy.

The sea is the lifeblood of this island nation.