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unperturbed

adjectiveC1Rare in speech; mostly a word you read · #15,238 of 15,258leans written

Unperturbed means not worried by what is going on. Quite unperturbed, unperturbed by the noise, appear unperturbed.

It describes the outward calm rather than the inward state, which is why it is so often used of somebody in a situation that plainly warrants alarm. It takes by. Perturbed on its own is rarer than its negative, which is unusual.

Definitions of unperturbed

  1. 1adjectiveunperturbedNot worried by what is going on.C1

    “The pilot sounded unperturbed as he announced that we were flying into a storm.”

unperturbed is a state.

Where it comes from

From un- + perturbed.

Etymology from Wiktionary, CC BY-SA

Practised in A Song of Ice and Fire

Practise this word

unperturbed in the wild

  • The time evolution under this perturbed Hamiltonian therefore results in oscillations, called Rabi cycles, between the two unperturbed states.

    Rabi cycle

  • In the strong coupling limit, a complete oscillation between the unperturbed states is observed.

    Rabi cycle

  • Normally, beams of light pass through each other unperturbed.

    Two-photon physics

From Wikipedia, CC BY-SA 4.0. These sentences were written by other people about their own subjects; they are here to show the word at work, not as anybody’s opinion.

Related words

  • perturbed