In a perturbative manner / With regard to perturbation

(uncountable) Agitation; the state of being perturbed / (countable) A small change in a physical system, or more broadly any definable system (such as a biological or economic system)

(transitive, dated) To perturb.

To disturb; to bother or unsettle. / (physics) To slightly modify the motion of an object. / (astronomy) To modify the motion of a body by exerting a gravitational force.

simple past tense and past participle of perturb

Disturbed; flustered. / (mathematics) Slightly modified.

Third-person singular simple present indicative form of perturb

present participle of perturb

plural of perturbation

Of, pertaining to, or causing perturbation