Cinch (noun)

A sure thing; a thing that is easily accomplished.

Origin:

The word is of spanish origin, which means a girth for a horse or mule, recorded in english in the 18th century.

Examples:

1. It was a cinch to fix the broken lamp.
2. The test was a cinch, I had studied well.
3. It's a cinch to make this recipe, even for a beginner cook.
4. The game was a cinch for the home team.
5. The deal was a cinch, he had all the information he needed.