talkative
The word is possibly "muted."
There are several, including placid, muted, hushed, muffled, or soundless.
quiet
loud
Loud.
The word "noisy" or noise.
A 5-letter opposite for the word noisy is quiet,
Antonyms for the word loud: inaudible, low, quiet, soft, subdued
The opposite word for talkative is "quiet" or "reserved."
Another word for quiet or motionless could be silent or still.
The word that has only four letters and is the opposite of mean in NICE
Loud. Ya bass...