From Longman Dictionary of Contemporary Englishlifebloodlife‧blood /ˈlaɪfblʌd/ noun [uncountable] 1 IMPORTANTthe most important thing needed by an organization, relationship etc to continue to exist or develop successfullylifeblood of Communication is the lifeblood of a good marriage.2 literaryHBH your blood
Examples from the Corpus
lifeblood• The glass and crystal sold on the roadside here are the lifeblood of the local economy.• Promises are the lifeblood of politics.• Equipped with floats, these dependable aircraft proved to be the lifeblood of the community.• From its first day, the lifeblood of Black Mountain was talk.• Advertising is the lifeblood of newspapers.• Money is the lifeblood of your business.• Donation by direct debit is now the lifeblood for most charities.• For conservation is part of the lifeblood of all of us who use the outdoors for recreation.• The lifeblood of Sarajevo will drain away, the television cameras will go home and Bosnia will be forgotten in the West.From Longman Business Dictionarylifebloodlife‧blood /ˈlaɪfblʌd/ noun [singular] the most important thing needed by an organization, country etc in order to continue or develop successfullyCash flow is the lifeblood of any company.The companies argue that patents are their lifeblood. 