Definition of "Worse" :

noun: something inferior in quality or condition or effect

"For better or for worse."

adjective: (comparative of bad') inferior to another in quality or condition or desirability

"This road is worse than the first one we took."

adjective: changed for the worse in health or fitness

"I feel worse today."

adverb: (comparative of ill') in a less effective or successful or desirable manner

"He did worse on the second exam."