gadget
/ɡædʒɪt/noun
A small tool or device, often clever or unusual, especially one whose exact name you can't remember.
Example sentences
- “My kitchen drawer is full of gadgets I've only used once.”
- “He loves gadgets and always buys the newest smartwatch.”
Affectionately informal, and usually small and electronic these days. 'Gizmo' and 'gadget' both fill the gap when the real name escapes you.