Chapter Inventor to Ivory-nut of I by Soule's Synonymes

2. Immutable, invariable, changeless.

Irrevocable, a.

1. Unchangeable. See Irreversible, 1.

2. Incapable of recall or revocation.

Irrigate, v. a. Water, moisten, wet.

Irrigation, n. Watering.

Irritability, n.

1. Irascibility, fretfulness, testiness, peevishness, petulance, excitability, snappishness.

2. Susceptibility (to the influence of a stimulus).

3. Excitability, high susceptibility.

Irritable, a.

1. Irascible, fretful, testy, touchy, peevish, pettish, waspish, snappish, choleric, splenetic, captious, petulant, excitable, hot, hasty, peppery, passionate, fiery.

2. Susceptible (to the influence of a stimulus).

3. Excitable, highly susceptible.

Irritate, v. a.

1. Provoke, nettle, chafe, incense, exasperate, enrage, anger, fret, offend, vex, annoy, tease, gall.

2. (Med.) Inflame (by friction), excite, stimulate.

Irritation, n.

1. Irritating.

2. Exasperation, provocation, wrath, ire, anger, passion, excitement, indignation, resentment.

3. (Med.) Inflammation (by friction), excitation, stimulation.