1. TRANQUILLITY   congestion   insomnia   rancidity   commotion   transgression   Hint Hint       2. SEDENTARY   intentional   active   tenacious   craven   careless   Hint       3. UNIMPEACHABLE   boorish   impious   exemplary   blameworthy   essential   Hint       4. INDOLENT   sedulous   inept   inimical   austere   affluent   Hint       5. SENILITY   veracity   emptiness   fallacy   youthfulness   memorability   Hint       6. VANGUARD   stern   defence   vantage   rearguard   stepney   Hint       7. TREMULOUS   wan   meagre   trifling   persevering   steady   Hint