noun / verb
megaphone
MEG-uh-fohn/ˈmeɡəfəʊn/
A cone-shaped device used to amplify the voice.
The older man speaks into a megaphone to make his voice louder.

Etymology
The pieces give the image of a “great voice”: the instrument magnifies a speaker’s voice, making it louder rather than changing what is said.
In context
The explosion had deafened me. "Cannot hear." I said. He came towards me making a megaphone of his hands and shouted
More examples
- The coach calls instructions through a megaphone from the sidelines.
- This battery-powered megaphone has a volume control on the handle.
- Local newspapers megaphone the residents' demands for safer streets.
Forms
megaphone · megaphones · megaphoned · megaphoning
Similar words
- bullhorn
- Usually an electric megaphone, especially for addressing outdoor crowds.
- loudspeaker
- Converts electrical signals into sound rather than simply channeling the voice.