[经] 保证金

Caution \Cau"tion\, n. [F. caution a security, L. cautio, fr.
cavere (For scavere) to be on one's guard, to take care
(orig.) to be on the watch, see; akin to E. show.]
1. A careful attention to the probable effects of an act, in
order that failure or harm may be avoided; prudence in
regard to danger; provident care; wariness.

2. Security; guaranty; bail. [R.]

The Parliament would yet give his majesty sufficient
caution that the war should be prosecuted.
--Clarendon.

3. Precept or warning against evil of any kind; exhortation
to wariness; advice; injunction.

In way of caution I must tell you. --Shak.

4. (Civil & Scots Law) A pledge, bond, or other security for
the performance of an obligation either in or out of
judicial proceedings; the promise or contract of one not
for himself but another; security.
[Webster 1913 Suppl.]

{Caution money}, money deposited by way of security or
guaranty, as by a student at an English university.

Syn: Care; forethought; forecast; heed; prudence;
watchfulness; vigilance; circumspection; anxiety;
providence; counsel; advice; warning; admonition.