The word "guarantee" is correct and usable in written English. You can use it to refer to a promise to assure that something will happen or be the case or that someone will or will not do something. Example sentence: I guarantee that I will finish my project on time.
His wife, Patience, led the rally with a song asking God to guarantee his victory.
If, in addition, the state could guarantee part of the value of the bonds they would quickly have high-quality ratings.
Dave Smith, the group's spokesman, said: "Hopefully by the BSG applying for core participant status, we will be able to guarantee that spying on trade unions and passing over information to private companies becomes a theme within the Pitchford inquiry".
Earlier this year the appeal court rejected a legal challenge by Debbie Purdy, a multiple sclerosis patient, who wanted a guarantee that her husband would not be prosecuted for helping her to travel to Switzerland to take her life.
"That's why the home secretary has agreed a number of significant changes to provide the necessary assurance and guarantee the primacy of the chief constable".
If you don't make a claim, there is no guarantee that your premium won't go up if you have even a minor accident.
Further ahead, economists warn that a €7.2bn package would merely buy some time for Athens but by no means guarantee Greece could remain in the eurozone – something polls suggest most Greeks want.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK