GRE Word List - 151

1. impend - To be imminent.

2. imperative - Obligatory.

3. imperceptible - Indiscernible.

4. imperfectible - That can not be perfected.

5. imperil - To endanger.

6. imperious - Insisting on obedience.

7. impermissible - Not permissible.

8. impersonal - Not relating to a particular person or thing.

9. impersonate - To appear or act in the character of.

10. impersuadable - Unyielding.

11. impertinence - Rudeness.

12. imperturbable - Calm.

13. impervious - Impenetrable.

14. impetuosity - Rashness.

15. impetuous - Impulsive.