Guarantee

[gar-uh n-tee] /ˌgær ənˈti/

noun
1.
a promise or assurance, especially one in writing, that something is of specified quality, content, benefit, etc., or that it will perform satisfactorily for a given length of time:
a money-back guarantee.
2.
an assurance that another’s obligation will be fulfilled, or something presented as such security; (defs 1, 2).
3.
something that assures a particular outcome or condition:
Wealth is no guarantee of happiness.
4.
a person who gives a guarantee or guaranty; .
5.
a person to whom a guarantee is made.
verb (used with object), guaranteed, guaranteeing.
6.
to secure, as by giving or taking security:
A credit card guarantees your reservation at the hotel.
7.
to make oneself answerable for (something) on behalf of someone else who is primarily responsible:
to guarantee the fulfillment of a contract.
8.
to undertake to ensure for another, as rights or possessions:
The Constitution guarantees freedom of religion.
9.
to serve as a warrant or guaranty for.
10.
to undertake to protect or indemnify:
to guarantee a person against loss.
11.
to undertake (to do something):
I will guarantee to prove every word I stated.
12.
to promise (usually followed by a clause as object):
I guarantee that I’ll be there.
/ˌɡærənˈtiː/
noun
1.
a formal assurance, esp in writing, that a product, service, etc, will meet certain standards or specifications
2.
(law) a promise, esp a collateral agreement, to answer for the debt, default, or miscarriage of another
3.

4.
a person who acts as a guarantor
5.
something that makes a specified condition or outcome certain
6.
a variant spelling of guaranty
verb (mainly transitive) -tees, -teeing, -teed
7.
(also transitive) to take responsibility for (someone else’s debts, obligations, etc)
8.
to serve as a guarantee for
9.
to secure or furnish security for: a small deposit will guarantee any dress
10.
usually foll by from or against. to undertake to protect or keep secure, as against injury, loss, etc
11.
to ensure: good planning will guarantee success
12.
(may take a clause as object or an infinitive) to promise or make certain
n.

1670s, alterted (perhaps via Spanish garante), from earlier garrant “warrant that the title to a property is true,” early 15c., from Old French garant “defender, protector,” from Germanic (see warrant (n.)). For form evolution, see gu-. Originally “person giving something as security;” sense of the “pledge” itself (which is properly a guaranty) developed 17c.
v.

1791, from guarantee (n.). Garanten in this sense is from early 15c. Related: Guaranteed; guaranteeing.