1. make easier   LAMPOON   FACILITATE   GRATIFY   FATHOM   Hint Half-n-half Clue   2. become weak or speak hesitantly   LANGUISH   INDUCE   INTERVENE   FALTER   Half-n-half Clue   3. grieve   FATHOM   IMPEDE   LAMENT   GRATIFY   Half-n-half Clue   4. influence by frightening   HEED   LANGUISH   INTIMIDATE   INDICT   Half-n-half Clue   5. stay for long time   INVERT   LINGER   IMPAIR   IMPUTE   Half-n-half Clue   6. reverse   INVERT   FALTER   IMPLEMENT   IMPEDE   Half-n-half Clue   7. understand   INCITE   LAMENT   FATHOM   IMPUTE   Half-n-half Clue