What's the difference between surety and unsurety?

Surety

Definition:

(n.) The state of being sure; certainty; security.
(n.) That which makes sure; that which confirms; ground of confidence or security.
(n.) Security against loss or damage; security for payment, or for the performance of some act.
(n.) One who is bound with and for another who is primarily liable, and who is called the principal; one who engages to answer for another's appearance in court, or for his payment of a debt, or for performance of some act; a bondsman; a bail.
(n.) Hence, a substitute; a hostage.
(n.) Evidence; confirmation; warrant.
(v. t.) To act as surety for.

Example Sentences:

(1) The radio talkshow host, whose syndicated show is the most listened-to talk-radio programme in the US, said Moore and others who provided surety for Assange's return to court on sex charges filed by Swedish prosecutors were "fans of serial rapists".
(2) The Australian journalist Phillip Knightley, said he had also offered £20,000 in surety for Assange, but he had no regrets about putting his money at stake.
(3) However, although the company's loans are not raised by using the property as surety, as mortgages are, the loans are attached to the property to which the improvements are made.
(4) He expressed a surety about how he saw the world and his place in it.
(5) Khan and other supporters of Assange, including film director Ken Loach and publisher Felix Dennis, posted bail totalling £200,000 to Westminster magistrates court, with a further £40,000 as promised sureties, to secure the WikiLeaks' founder's freedom when he first faced extradition proceedings in 2010 .
(6) None of the combinations or arrangements suggested surety.
(7) The federal government’s contribution towards hospitals and schools has to go up.” “The states require a return to surety on health and education.
(8) However before a ball was kicked in 92-93, the FAW requested that the club put up a bond as surety that their floodlights would be erected in time for the beginning of the League Cup competition.
(9) Two broad questions need to be asked: what is the government's role in facilitating application of contemporary nutrition knowledge to public health, and what standard of scientific surety should be the basis for its application?
(10) The unidentified defendant was allowed bail at Canterbury crown court in Kent on Friday but was not freed until Monday because it was not clear whether his bail surety had been paid.
(11) It emerged in the hearing that the DfT had demanded a greater surety from FirstGroup, pushing up the bond from £50m and settling on £200m, although at one point FirstGroup had offered £15m more.
(12) Several high-profile figures have supported Assange since his arrest in December 2010, including the film director Ken Loach and socialite and charity fundraiser Jemima Khan, who each offered £20,000 as surety.
(13) He immediately responded and asked if I would be prepared to come to court in the next hour to act as a surety for Assange.
(14) The decision by the district judge Howard Riddle to remand Assange into custody was made despite the film director Ken Loach, the journalist John Pilger, and the socialite Jemima Khan, offering sureties for him totalling £180,000.
(15) Failing reasonable surety of extirpation, permitting spontaneous healing, if feasible, is the best cours.
(16) "When looking into the eyes of those your government believe have veered from the path of democracy, British prime ministers and foreign secretaries alike will need to be able to speak with conviction and surety," their letter said.
(17) There were more reports on Monday nightof customers badly inconvenienced by the meltdown, including an unnamed man who was granted bail at Canterbury crown court, Kent, on Friday, but had to wait until Monday to be released because the bank computer problems prevented the court from confirming receipt of a surety demanded by the judge in the case.
(18) Restaurant designer Sarah Saunders also pledged £20,000 in surety.
(19) The bail conditions are that security of £200,000 is deposited with the court before Assange is freed, as well as two sureties of £20,000 each from two named people.
(20) Wednesday Trump began Wednesday with his unique combination of self-pity and self-importance, announcing in a speech to the Coast Guard Academy in Connecticut : “No politician in history, and I say this with great surety, has been treated worse or more unfairly.” But the Senate intelligence committee joined the House oversight committee in asking the acting FBI chief, Andrew McCabe, to hand over any notes or memos from Comey, and wrote to Comey asking him to appear in both open and closed sessions.