undisturbed
adj. B2 Upper Intermediate US //ˌəndɪˈstɝbd// UK //ʌndɪstˈɜːbd// undis·turbed
adj. not touched or moved by anyone. You use this to describe a place or thing that is left alone and in its natural state.
adj. not touched, moved, or interfered with. Often used to describe a state of peace or a natural environment that has not been altered by human activity.
The forest remained undisturbed for centuries.
The archaeologists found the ancient site in an undisturbed state, preserving the original layout of the ruins.
The researchers observed the undisturbed behavior of the birds, noting how they reacted to the presence of the team without showing any signs of stress.
From un- + disturbed.