I ( ee ) - v iúr.
iallach (-aigh) - bríocht of restraint or compulsion.
iarlais - changeling.
iarrairdeall - lit. "Solicitous attention"; blank-mind receptiveness.
idircheo - area of overlapping liminality between an Domhan-so and an Saol Eile. (lit. between-mist).
idirchian - far distant time or place (lit. between-length).
idirchrios - transitional area (lit. between-belt).
ilchiallú - pun, doubled entrendre, i.e. in bríocht a "sea-horse" is valid as a "horse".
ildathach - multicolored, breac.
iloireadas - non-concurrentness of geography and time between the worlds.
ilsaoltactaíocht - (practice of) multiplicity of realities.
imbas - v iombhas.
Imbolg - high day that begins sunset 31st January.
immram - wonder voyage (late borrowing).
Inbhear Scéine - Kenmare estuary, place of mortal's first arrival in Ireland.
inchinn - brain (cf aigne 7rl).
intinn - mind, intent, purpose, will, "bent" as basic mental characteristics (cf aigne 7rl).
íocluibh - healing herb (general term).
iodh - (esp. neck) ring (not open over throat, cf torc).
iomarbhá - contention (usually used for róe [qv] of poets, 7rl).
iomarta - magical influence, not direct bríocht.
iomartas (-ais) - magical influence.
iomas - poetic intuition or inspiration (cf éicse; poc, síúlacht, túras).
iombhas - poetic knowledge won or attained.
iombhas forosna - a much disputed technique of trance using or gaining iombhas with which to prophesize.
iompóchur - bríocht to reverse, reflect, "boomerang" ward.
iris - 1) credo; 2) journal; 3) tryst; 4) contract; 5) texts.
iúl - 1) knowledge, statement; 2) guidance, direction; 3) attention; 4) an (esp. seemingly minor) event that solicits a response or indicates a course of action (v scruth bhua, cf caoilíth, taispeánadh).
iúr - Yew, fiodh of letter I, associated with, among other things, death and immortality, primordiality, adytum; tree from which all others sprouted.