A device or element that produces flame or heat.

• A stove heating element or gas flame on a cooktop.
• A lab heat source such as a Bunsen burner.
• A fuel-burning unit in heaters, boilers, or hot-air balloons.
• An incinerator used to burn waste.

A device or software that writes data to CDs or DVDs.

A disposable mobile phone used briefly to avoid tracing.

• An app that provides temporary phone numbers.
• A temporary or throwaway online account.

An elaborate, high-quality piece of graffiti.

A participant in the Burning Man festival.