Engineering Testing Methods

noun a slight irregular or jerky motion

verb to move with quick, short, jerky movements

• The scientist observed the molecules jiggle under the microscope.
• She couldn't help but jiggle with excitement as she waited for her results.
• I love watching the jelly on my plate jiggle when I shake it.
• The uncertainty of the situation made his confidence jiggle a bit.

noun a tool or machine used for abrading or wearing down a surface through friction

• The abraser machine is used to test the abrasion resistance of materials.
• I accidentally abrased my new shoes on the rough pavement.
• Don't abrase your phone screen by putting it in the same pocket as your keys.
• The constant criticism began to abrase her self-confidence over time.