Yes they are more nauseating
the five tigers have been eating more than usual
Worsened is a modifier meaning something became worse, or was made worse, than it had formerly been.
The usual interpretation is that if you do something bad, then lie about it, you can be in worse trouble than if you simply told the truth and admitted your guilt.
lethargy
It means that she has just been in the shower
lethargy
The icebergs had been drifting further South than usual.
I'm pretty sure that 'worst' is past tense and 'worse' is in general. That was the worst game I've ever been to. Jimmy is worse than Timmy at soccer.
Snow is worse than rain. Ice is worse than snow.
Yes, when people talk about having bad flu or a bad case of the flu, they just mean it is giving them worse symptoms than usual or than the last flu virus they caught.
That depends. "Super storm" does not have a definition in meteorology and has been applied to a variety of storms, some not as bad as a hurricane, and some worse than the typical hurricane. However, the very worst of hurricanes are far worse than these so- called super storms.