"Guarantee" is a word in LAW AND LEGAL, ENGLISH

He to whom a guaran-ty is made. This word ls also used, as a noun, to denote the contract of guaranty or the obligation of a guarantor, and, as a verb, to denote the action of assuming the responsibilities of a guarantor. But on the general principle of legal orthography,—that the title of the person to whom the actlon passes over should end in “ee,” as “donee," “grantee,” “payee,” “bailee,” “drawee,” etc., —it seems better to use this word only as thecorrelative of “guarantor," and to spell the verb, and also the name of the contract, “guaranty

In law and common usage: A promise to answer for the
payment of some debt, or the performance of some duty, in case of the
failure of another person, who is, in the first instance, liable to
such payment or performance; an engagement which secures or insures
another against a contingency; a warranty; a security. Same as
Guaranty.

The person to whom a guaranty is made; -- the
correlative of guarantor.

In law and common usage: to undertake or engage for the
payment of (a debt) or the performance of (a duty) by another person;
to undertake to secure (a possession, right, claim, etc.) to another
against a specified contingency, or at all avents; to give a guarantee
concerning; to engage, assure, or secure as a thing that may be
depended on; to warrant; as, to guarantee the execution of a treaty.

One who binds himself to see an undertaking of another
performed; a guarantor.