Defn: Not responsive; not able, ready, or inclined to respond.

IRRESUSCITABLE
Ir`re*sus"ci*ta*ble, a.

Defn: Incapable of being resuscitated or revived.
— Ir`re*sus"ci*ta*bly, adv.

IRRETENTION
Ir`re*ten"tion, n.

Defn: Want of retaining power; forgetfulness. De Quincey.

IRRETENTIVE
Ir`re*ten"tive, a.

Defn: Not retentive; as, an irretentive memory.

IRRETRACEABLE
Ir`re*trace"a*ble, a.

Defn: Incapable of being retraced; not retraceable.

IRRETRACTILE
Ir`re*tract"ile, a.