Preferenní
Preferenní is not a widely established term in major reference works as of 2024. It is likely a misspelling or a nonce coinage derived from the word preference by adding a Czech- or Slovak-style suffix. The standard, attested form in those languages is preferenční, meaning relating to or arising from a preference, or indicating preferential treatment.
In practice, if preferenní appears in a text, it is usually interpreted as a nonstandard variant of
Because preferenní is not a standard term, its meaning is best inferred from surrounding language and context.