Perturbed vs. Unperturbed

Perturbedverb

simple past tense and past participle of perturb

Unperturbedadjective

Not perturbed

Perturbedadjective

Disturbed; flustered.

Unperturbedadjective

free from emotional agitation or nervous tension;

‘the waiters were unflurried and good natured’; ‘with contented mind and unruffled spirit’;

Perturbedadjective

(mathematics) Slightly modified.

‘The equation x² − 3.0001x + 2 = 0 is a perturbed version of x² − 3x + 2 = 0.’;

Perturbedadjective

Agitated; disturbed; troubled.

Perturbedadjective

thrown into a state of agitated confusion; (`rattled' is an informal term)