When you cringe, you shrink or move away from something you don't like. People cringe to express a variety of negative emotions, including fear and embarrassment.
A syringe is a device that is used for putting a measured quantity of fluid into something else. Syringes are often, but not always, fitted with a sharp, hollow point at one end for injecting liquids into things.
Syringes can be used for things as diverse as feeding baby animals, or for injecting medicine into you.
