megaphone
/ˈmeɡəfəʊn/·메가폰·noun
a funnel-shaped device that amplifies the voice
GreekCEFR B2
Root
Greek 'megas' (great, large) + 'phone' (sound, voice)
Greek megas (large) + phone (sound) → coined by Thomas Edison (1878) as megaphone → standard English term
In a word
Greek megas (great) + phone (sound). Coined by Edison in 1878. The mega family unfolds 'large' across quantities — megaphone (great sound), megalith (great stone), megalomania (great self-delusion), megabyte (a million bytes). A neologism Edison made by gluing two Greek words is now in the hands of protesters and film directors.
Examples
The director shouted instructions through a megaphone.
Protesters carried megaphones in the rally.
A megaphone makes a thin voice carry far.
Related
megaphonicmegalithmegalomaniamegabytephone