Question

Unti-, co-,dis-, ex-,il-, in-,im-, ir-, inter-, mis-, over-,un-,re-. 1 crowded 2 interested 3 author 4 mature 5 tell 6 important 7 behaving 8 polite 9 necessary

Answer 1

1 overcrowded 2 uninterested 3 co-author 4 immature 5 retell 6 unimportant
7 misbehaving 8 impolite 9 unnecessary

Answer 2

1. Crowded: Prefix "over-" can be added to form "overcrowded", meaning excessively filled or crowded.
2. Interested: No prefix needed.
3. Author: No prefix needed.
4. Mature: No prefix needed.
5. Tell: No prefix needed.
6. Important: Prefix "un-" can be added to form "unimportant", meaning not significant or noteworthy.
7. Behaving: Prefix "mis-" can be added to form "misbehaving", meaning behaving badly or improperly.
8. Polite: Prefix "im-" can be added to form "impolite", meaning not showing good manners or courtesy.
9. Necessary: Prefix "un-" can be added to form "unnecessary", meaning not needed or essential.