What is an antonym for cliche?

Here are some antonyms for cliche, depending on the context:

General:

* Original

* Unique

* Novel

* Fresh

* Innovative

* Uncommon

* Unconventional

Specific to language:

* Idiosyncratic (peculiar to an individual)

* Neologism (a newly coined word or expression)

* Unhackneyed (not commonplace or trite)

* Fresh (new and original)

Specific to ideas:

* Provocative

* Thought-provoking

* Insightful

* Original

The best antonym will depend on the specific meaning and context of the word "cliche" in your sentence.