Part 397

Syn. -- Irrevocable; irrepealable; unchangeable.

Ir`re*vers"i*ble*ness (?), n. The state or quality of being irreversible.

Ir`re*vers"i*bly, adv. In an irreversible manner.

Ir*rev`o*ca*bil"i*ty (?), n. [Cf. F. irrévocabilité.] The state or quality of being irrevocable; irrevocableness.

Ir*rev"o*ca*ble (?), a. [L. irrevocabilis: cf. F. irrévocable. See In- not, and Revoke, and cf. Irrevocable.] Incapable of being recalled or revoked; unchangeable; irreversible; unalterable; as, an irrevocable promise or decree; irrevocable fate.

Firm and irrevocable is my doom.

Shak.

-- Ir*rev"o*ca*ble*ness, n. -- Ir*rev"o*ca*bly, adv.

Ir`re*vok"a*ble (?), a. [Pref. ir- not + revoke.] Irrevocable. [R.]

Ir*rev"o*lu*ble (?), a. That has no finite period of revolution; not revolving. [R.]

The dateless and irrevoluble circle of eternity.

Milton.

Ir`rhe*tor"ic*al (?), a. Not rhetorical.

Ir"ri*gate (?), v. t. [imp. & p. p. Irrigated (?); p. pr. & vb. n. Irrigating (?).] [L. irrigatus, p. p. of irrigare to irrigate: ir- in + rigare to water; prob. akin to E. rain. See Rain.]

1. To water; to wet; to moisten with running or dropping water; to bedew.

2. (Agric.) To water, as land, by causing a stream to flow upon, over, or through it, as in artificial channels.

Ir`ri*ga"tion (?), n. [L. irrigatio: cf. F. irrigation.] The act or process of irrigating, or the state of being irrigated; especially, the operation of causing water to flow over lands, for nourishing plants.

Ir*rig"u*ous (?), a. [L. irriguus. See Irrigate.]

1. Watered; watery; moist; dewy. [Obs.]

The flowery lap Of some irriguous valley spreads her store.

Milton.

2. Gently penetrating or pervading. [Obs.] J. Philips.

Ir*ris"i*ble (?), a. [Pref. ir- not + risible. See Irrision.] Not risible. [R.]

Ir*ri"sion (?), n. [L. irrisio, fr. irridere, irrisum, to laugh at; pref. ir- in + ridere to laugh: cf. F. irrision.] The act of laughing at another; derision.

This being spoken scepticè, or by way of irrision.

Chapman.

Ir`ri*ta*bil"i*ty (?), n. [L. irritabilitas: cf. F. irritabilité.]

1. The state or quality of being irritable; quick excitability; petulance; fretfulness; as, irritability of temper.