1. obstruct   INSTIGATE   INCITE   HAMPER   FALTER   Hint Half-n-half Clue   2. put into effect   INDUCE   IMPLEMENT   IMPAIR   LAMENT   Half-n-half Clue   3. weaken   IMPAIR   IMPUTE   INDUCE   INCITE   Half-n-half Clue   4. attribute to someone   LAMENT   IMPUTE   FATHOM   FALTER   Half-n-half Clue   5. pay attention to   INTERVENE   IMPEDE   LANGUISH   HEED   Half-n-half Clue   6. make easier   FACILITATE   IMPAIR   GRATIFY   INVERT   Half-n-half Clue   7. hinder   IMPEDE   INDICT   INDUCE   LAMPOON   Half-n-half Clue