The Collaborative International Dictionary
Irresponsive
Irresponsive \Ir`re*spon"sive\, a. Not responsive; not able, ready, or inclined to respond.
Wiktionary
irresponsive
a. That does not respond to stimuli
Usage examples of "irresponsive".
The lamb bunted several irresponsive objects--never its dam's udder--baaing listlessly.