17 These people are springs without water and mists driven by a storm. Blackest darkness is reserved for them.

Read 2 Peter 2:17 Using Other Translations

These are wells without water, clouds that are carried with a tempest; to whom the mist of darkness is reserved for ever.
These are waterless springs and mists driven by a storm. For them the gloom of utter darkness has been reserved.
These people are as useless as dried-up springs or as mist blown away by the wind. They are doomed to blackest darkness.