It's possible you're thinking of a similar-sounding suffix, like "-ne" or "-sine."
* "-ne" is a common interrogative suffix in Latin, indicating a question. For example:
* *estne?* (is it?)
* *quidne?* (why?)
* "-sine" means "without" and is used to form adjectives. For example:
* *legis sine* (without laws)
* *spes sine* (without hope)
If you can provide more context or an example of the word ending in "-sne," I might be able to offer a more specific answer.