If a person or thing is the worse for something, they have been harmed or badly affected by it. If they are none the worse for it, they have not been harmed or badly affected by it. Father came home from the pub very much the worse for drink They are all apparently fit and well and none the worse for the fifteen hour journey
If a situation goes from bad to worse, it becomes even more unpleasant or unsatisfactory. For the past couple of years my life has gone from bad to worse
(comparative of `bad') inferior to another in quality or condition or desirability; "this road is worse than the first one we took"; "the road is in worse shape than it was"; "she was accused of worse things than cheating and lying"
Worse is used to form the comparative of compound adjectives beginning with `bad' and `badly.' For example, the comparative of `badly off' is `worse off'