Wiktionary
unobserving
a. Failing to observe something; unobservant.
Usage examples of "unobserving".
Adrian and I, leaving Clara and Evelyn wrapt in peaceful unobserving slumber, carried the body to this desolate spot, and placed it in those caves of ice beneath the glacier, which rive and split with the slightest sound, and bring destruction on those within the clefts--no bird or beast of prey could here profane the frozen form.