a. A girth for a pack or saddle.
b. An encircling cord, band, or belt.
a. Something easy to accomplish. See Synonyms at breeze1.
b. A sure thing; a certainty: Their team is a cinch to win the tournament.
v. cinched, cinch·ing, cinch·es
a. To put a saddle girth on (a horse).
b. To secure (a saddle) by means of a cinch.
c. To encircle or wrap tightly: "her hair orderly, her nightgown cinched around her neck" (E. Annie Proulx).
d. To tighten (an encircling cord or belt, for example).
2. Informal To make certain; secure or guarantee: cinch a victory.
To tighten an encircling band or saddle girth. Often used with up.
[Spanish cincha, feminine of cincho, belt, from Latin cīnctus, from past participle of cingere, to gird; see kenk- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.