Lavender is a versatile herb in the mint family. Its key constituent is volatile oils which is why it is a popular essential oil with many uses. Lavender comes from the word lavare which means to wash. The romans used it to scent baths. It has anti-bacterial and anti-septic properties. It is used to disinfect cuts, wounds and sores. It can soothe bites and burns. It can be used to ward off insects.