General Opposites:
* Unfavorable: This is the most direct opposite, meaning not favorable.
* Adverse: This implies something harmful or negative.
* Unfortunate: This suggests something unlucky or undesirable.
* Disadvantageous: This emphasizes that something is harmful or detrimental.
Specific Opposites based on context:
* Unpromising: If "favorable" refers to a positive outlook, the opposite could be "unpromising."
* Unlikely: If "favorable" implies a high chance of success, "unlikely" is a good opposite.
* Unacceptable: If "favorable" means something is acceptable or desirable, the opposite is "unacceptable."
Example:
* "The weather is unfavorable for a picnic." (meaning the weather is bad)
* "The company received unfavorable reviews for its new product." (meaning the reviews were negative)
The best opposite word will depend on the specific situation and the meaning you want to convey.