a strong girth used on stock saddles, having a ring at each end to which a strap running from the saddle is secured.

a firm hold or tight grip.

Informal .

something sure or easy

This problem is a cinch.

a person or thing certain to fulfill an expectation, esp. a team or contestant certain to win a sporting event

The Giants are a cinch to win Sunday's game.

to gird with a cinch; gird or bind firmly.

Informal . to seize on or make sure of; guarantee

Ability and hard work cinched her success.

noun

breeze , cakewalk , child’s play , duck soup * , no sweat , piece of cake * , snap , child\'s play , pushover , walkaway , walkover , sure thing , (colloq.) tight grip , assure , belt , certainty , fasten , girth , grip , piece of cake , sash

verb

assure , ensure , insure , secure , warrant