Synonyms of the word 
UNASSERTIVE → NONAGGRESSIVE - NONASSERTIVE - RETICENT - RETIRING - SELF-EFFACING - SUBMISSIVE - TIMID - UNAGGRESSIVE
unassertive
- adj. Not assertive.
nonaggressive
- adj. Not aggressive.
nonassertive
- adj. Not assertive.
reticent
- adj. Keeping one's thoughts and opinions to oneself; reserved or restrained.
- adj. (proscribed) Hesitant or not wanting to take some action; reluctant (usually followed by to and a verb…
retiring
- adj. Shy, introverted, liking privacy and seclusion.
- adj. About to retire from work.
- v. present participle of retire.
- n. retirement.
self-effacing
- adj. Shy, extremely humble and modest; making oneself seem unnoticeable.
submissive
- n. one who submits.
- adj. Meekly obedient or passive.
timid
- adj. Lacking in courage or confidence.
unaggressive
- adj. Not aggressive. Peaceable. Not violent.
If you are interested in words, visit the following sites :
- wiktionary.org/unassertive For complete definition of a word
- 1word.ws/unassertive to play with words, suffixs, prefixs, etc.