1. stay for long time   IMPAIR   LINGER   IMPEDE   IMPLEMENT   Hint Half-n-half Clue   2. lose vitality   LINGER   LAMPOON   INCITE   LANGUISH   Half-n-half Clue   3. make easier   GAINSAY   LAMPOON   FACILITATE   INSTIGATE   Half-n-half Clue   4. put into effect   GAINSAY   HEED   IMPLEMENT   FACILITATE   Half-n-half Clue   5. become weak or speak hesitantly   INVERT   FALTER   INTIMIDATE   LAMPOON   Half-n-half Clue   6. obstruct   GAINSAY   INCITE   HAMPER   FACILITATE   Half-n-half Clue   7. pay attention to   IMPUTE   IMPAIR   HEED   INDUCE   Half-n-half Clue