1. reverse   INVERT   IMPLEMENT   IMPAIR   IMPUTE   Hint Half-n-half Clue   2. stay for long time   INVERT   LINGER   IMPLEMENT   FATHOM   Half-n-half Clue   3. provoke   INTIMIDATE   HAMPER   INTERVENE   INSTIGATE   Half-n-half Clue   4. influence by frightening   INTIMIDATE   GAINSAY   INDUCE   INTERVENE   Half-n-half Clue   5. hinder   GRATIFY   IMPUTE   IMPEDE   INDUCE   Half-n-half Clue   6. become weak or speak hesitantly   IMPLEMENT   FACILITATE   FALTER   INDUCE   Half-n-half Clue   7. come between   INTERVENE   LAMENT   GRATIFY   INVERT   Half-n-half Clue