irrebuttable - impossible to refute or contradict

irrefragable
adj.
5LL irrefragabilis < L in3, IN32 + refragari, to oppose < re3, against + (suf)fragari: see SUFFRAGAN6 that cannot be refuted; indisputable
ir[ref#ra[ga[bil4i[ty
n.
ir[ref4ra[ga[bly
adv.

irretrievable - impossible to recoup, retrieve, or repair

irreverent - not proceeding from or expressing honor or respect


irrupt
vi.
5< L irruptus, pp. of irrumpere, to break in: see IN31 & RUPTURE6
1 to burst suddenly or violently (into)
2 Ecol. to increase abruptly in size of population
ir[rup4tion
n.
ir[rup4tive
adj.

isallotherm line connecting points of equal change in temperature
isallobar
line connecting points of equal change in barometric pressure
isanemone
line connecting points on map having same wind velocity
above three definitions fron Forthright's Phronistery

isentropic - taking place without change of the amount of energy in a system not available for doing work

isepiptesis - as far as I can tell, this is a nonsense word from a really screwy site.
I think Scripps-Howard should be ashamed of listing such garbage.

I spent enough time on this, I'm going to quit for a while.

Incidentally, I'll bet few members ever read the Uncle Wiggley stories about the
Pipsisewah and the Skeezix trying to catch Uncle Wiggley and eat his souse.
Bet you don't know what "souse" is. And you'll have to PM me to find out. Or
else look it up in dictionary.