1. IMPAIR   pay attention to   weaken   lose vitality   ridicule   Hint Half-n-half Clue   2. LAMENT   ridicule   stay for long time   grieve   understand   Half-n-half Clue   3. INTERVENE   stay for long time   influence by frightening   come between   deny   Half-n-half Clue   4. INSTIGATE   provoke   understand   lose vitality   ridicule   Half-n-half Clue   5. GAINSAY   deny   become weak or speak hesitantly   hinder   accuse   Half-n-half Clue   6. HEED   become weak or speak hesitantly   reverse   satisfy   pay attention to   Half-n-half Clue   7. INVERT   become weak or speak hesitantly   influence by frightening   reverse   weaken   Half-n-half Clue