Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adjective: unassertive  ,ún-u'sur-tiv
  1. Inclined to timidity or lack of self-confidence
    "a shy unassertive person"

See also: nonaggressive, nonassertive, reticent, retiring, self-effacing, submissive, timid, unaggressive

Antonym: assertive