General intensification:
* -ness: This creates a noun meaning the state of being repulsive, e.g., "repulsiveness."
* -ly: This creates an adverb meaning in a repulsive manner, e.g., "repulsively."
Specific connotations:
* -ant: This can create a noun meaning something that repels, e.g., "repellant" (although this is more commonly used as an adjective meaning something that repels insects).
* -ing: This can create a noun meaning the act of repelling, e.g., "repelling" (but this is generally used as a verb, and the noun form is more commonly "repellent").
Other options:
* -some: This can create an adjective meaning causing repulsion, e.g., "repulsome" (though this is not a standard word).
* -ation: This can create a noun meaning the act of repelling, e.g., "repellation" (though this is uncommon and not recommended).
Ultimately, the best suffix to use will depend on the specific meaning and context you are aiming for. You may also consider using synonyms or phrases to express the desired meaning.