unassertive vs retiring

unassertive and retiring both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unassertive	No	Yes	No	No
retiring	No	Yes	No	No

unassertive (adjective)	retiring (adjective)
inclined to timidity or lack of self-confidence	not arrogant or presuming
	of a person who has held and relinquished a position or office
	reluctant to draw attention to yourself