General Antonyms:
* Forgettable: This is the most direct antonym, meaning something easily forgotten.
* Unremarkable: This suggests something ordinary or not particularly memorable.
* Ephemeral: This implies something fleeting and quickly forgotten.
More Specific Antonyms:
* Bland: This describes something lacking in interest or excitement.
* Boring: This describes something dull and likely to be forgotten.
* Trivial: This implies something unimportant and not worth remembering.
* Insignificant: This suggests something without lasting impact or meaning.
The best antonym for "unforgettable" will depend on the specific context and what aspect of "unforgettable" you want to contrast.