undiscerning vs discerning

undiscerning and discerning both are adjectives.

Word	Noun	Adjective	Verb	Adverb
undiscerning	No	Yes	No	No
discerning	No	Yes	No	No

undiscerning (adjective)	discerning (adjective)
lacking discernment	having or revealing keen insight and good judgment
	able to make or detect effects of great subtlety; sensitive
	quick to understand
	unobtrusively perceptive and sympathetic