1. IMPAIR   weaken   stay for long time   influence by frightening   hinder   Hint Half-n-half Clue   2. LANGUISH   lose vitality   reverse   deny   persuade   Half-n-half Clue   3. IMPEDE   ridicule   hinder   come between   obstruct   Half-n-half Clue   4. FATHOM   put into effect   stir up   understand   pay attention to   Half-n-half Clue   5. INVERT   deny   ridicule   reverse   come between   Half-n-half Clue   6. LINGER   accuse   stir up   stay for long time   satisfy   Half-n-half Clue   7. INSTIGATE   accuse   lose vitality   provoke   satisfy   Half-n-half Clue