Reboant is an adjective that means resonating or reverberating loudly. 

Sharing a common ancestor with words like reverb or reverberation, our word of the day comes from the Greek word for roar or cry. When the prefix RE is added, it implies an echo. 

Reboant has been a part of the English language since the early 17th century. Here’s an example:

Those reboant screams at the end of the movie have been haunting my dreams for the last five years. Hearing those echoes all these years reminds me of the most horrifying movie I’ve ever seen.