The word ‘better’ refers to something that is of higher quality, improved, or more favorable compared to another thing.
For example:
• This movie is better than the previous one.
• She did a better job than I expected.
The opposite of ‘better’ is ‘bad’, which refers to something of poor quality, less favorable, or undesirable.
For example:
• The weather today is bad.
• That was a bad decision.
Thus, the antonym of ‘better’ is ‘bad’.
Final Answer: bad