Learn how to say Preferentially correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word preferential:
of or involving preference or partiality; constituting a favour or privilege:
preferential interest rates may be offered to employees
preferential trade terms
(of voting or an election) in which the voter puts candidates in order of preference.
(of a creditor) having a claim on the receipt of payment from a debtor which will be met before those of other creditors.
mid 19th century: from preference, on the pattern of differential