warrant

noun

1
a writ from a court commanding police to perform specified acts
2
a written assurance that some product or service will be provided or will meet certain specifications
3
formal and explicit approval
a Democrat usually gets the union's endorsement
4
a type of security issued by a corporation (usually together with a bond or preferred stock) that gives the holder the right to purchase a certain amount of common stock at a stated price
as a sweetener they offered warrants along with the fixed-income securities

1
stand behind and guarantee the quality, accuracy, or condition of
The dealer warrants all the cars he sells
I warrant this information
2
show to be reasonable or provide adequate ground for
The emergency does not warrant all of us buying guns
The end justifies the means

Also useful for “warrant”:Unscrambler— Rearrange the letters in “warrant”