Definitions

1. verb

to cause something to stop rustling or making a soft hissing or whispering sound

“The unrustling of the leaves signaled the end of the storm.”

2. noun

the act or process of causing something to stop rustling or making a soft hissing or whispering sound

“The unrustling of the curtains was a soothing sound.”

3. adjective

not rustling or making a soft hissing or whispering sound

“The unrustling leaves lay still on the forest floor.”