What does undisturbed mean?
Undisturbed means not disturbed, interrupted, moved, or affected. It is used for physical conditions, as when water remains undisturbed or a surface is left undisturbed, and for people who remain calm despite noise, disruption, or emotional pressure. The word often conveys more than simple absence of activity: it suggests that something is stable, secure, and unaffected. In descriptions of sleep, "undisturbed" emphasizes continuity and peace, while phrases such as "undisturbed by criticism" describe composure and emotional resilience. Its negative form, built from the prefix "un-" and the word "disturb," gives it a precise and memorable meaning. Although it is more formal than everyday alternatives such as "calm" or "peaceful," it is widely used in both British and American English and is especially useful when the source of potential disruption is being emphasized.
adjectiveNot disturbed, interrupted, moved, or affected by something. In a person, it means calm, composed, and free from anxiety or emotional agitation.
- Not interrupted, moved, or affected by something.
- Calm, composed, and free from anxiety or emotional agitation.
"The lake remained undisturbed by the gentle breeze."
"Despite the noise outside, she slept undisturbed through the night."
"He remained undisturbed by the sudden change in plans."
Undisturbed can describe a peaceful landscape, a calm mind, or even a surface that has not been moved—meaning that serenity can apply to both people and places.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does undisturbed come from?
Undisturbed is an English formation made by combining the prefix "un-" with "disturb." The word dates from the early 17th century and originally meant not disturbed or unaffected. Its base word comes through Old French from Latin disturbare, a term associated with disrupting, disordering, or unsettling. The related forms disturbance, disturbing, and disturbed preserve the same Latin root.
How undisturbed is actually used
The word is formal and broadly neutral in register. It can describe a physical situation, such as water or a landscape, as well as a person's emotional state. The construction "undisturbed by" is especially common when emphasizing resilience to an interruption or external influence.