serving to excite or irritate / accompanied with, or produced by, increased action or irritation

Any substance causing irritation; an irritant.

plural of irritative

The quality of being irritative.

The act of irritating or annoying / The state of being irritated / A things or person that annoys / (physiology) a state of inflammation or painful reaction to allergy or cell-lining damage.

Capable of being irritated. / Easily exasperated or excited. / (medicine) Responsive to stimuli.

(transitive) To provoke impatience, anger, or displeasure in. / (intransitive) To cause or induce displeasure or irritation. / (transitive) To induce pain in (all or part of a body or organism).

simple past tense and past participle of irritate

Experiencing a feeling of irritation. / (pathology) Inflamed and painful.

Causing irritation or inflammation. / (law, Scotland) Rendering null and void; conditionally invalidating.