Douglas Harper's Etymology Dictionary
c.1600, from un- (1) "not" + inquisitive.
Wiktionary
a. Not inquisitive; incurious, not inclined to seek knowledge.
WordNet
adj. not inquiring [syn: uninquiring] [ant: inquiring]
deficient in curiosity [syn: uninquiring]
Usage examples of "uninquisitive".
Scrupulously polite, uninquisitive just as they had been uninformative.
The present alone interested Denver, but she was careful to appear uninquisitive about the things she was dying to ask Beloved, for if she pressed too hard, she might lose the penny that the held-out palm wanted, and lose, therefore, the place beyond appetite.
Lake was a sweet, cheerful, uninquisitive person, and she adored her husband.
Sedley was of so easy and uninquisitive a nature, that she wasn’t even jealous.
Ilse Tristramson (hi, Ilse, you were a dear, uninquisitive soul, and you touched my dove very gently).