Antonyms of adj unassertive

1 sense of unassertive

Sense 1
unassertive (vs. assertive) -- (inclined to timidity or lack of self-confidence; "a shy unassertive person")

assertive (vs. unassertive), self-asserting, self-assertive -- (aggressively self-assured; "an energetic assertive boy who was always ready to argue"; "pointing directly at a listener is an assertive act")
        => cocky -- (overly self-confident or self-assertive; "a very cocky young man")
        => emphatic, forceful -- (forceful and definite in expression or action; "the document contained a particularly emphatic guarantee of religious liberty")

Similarity of adj unassertive

1 sense of unassertive

Sense 1
unassertive (vs. assertive) -- (inclined to timidity or lack of self-confidence; "a shy unassertive person")
       => nonassertive -- (not aggressively self-assured, though not necessarily lacking in confidence; "she was quiet and nonassertive as she took control")
       => reticent, self-effacing, retiring -- (reluctant to draw attention to yourself)
          Also See-> submissive#1; timid#1; unaggressive#1, nonaggressive#1