Having or making no sound. See Synonyms at still1.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "soundless" in a sentence
"At the first cold touch of the elder’s embrace, Serena’s form contorted in soundless agony as she felt her essence torn apart and consumed."
"How is the sea "soundless" in all senses of the word "sound," connoting stability, measurability, noise, or something free of flaws?"
"There was a kind of soundless implosion and explosion centering on the woman."