Correct spelling, explanation: the word prejudice entered the English language in the times of Middle English, but it comes from Latin praejudicium, which was the combination of the words prae – in advance and judicium – judgement. The original meaning closely relates to the contemporary one and today the word prejudice is commonly used in everyday English as well as in professional law language.

Definition of prejudice:
noun – an opinion that is often unfair and based on stereotypes and not on knowledge,
Racial prejudice is one of the most serious problems in this area.
verb – to influence somebody’s opinions without any good reasons,
I know she wears all those strange clothes, but she’s a nice girl so try not to prejudice against her.
verb – to influence in a bad way,
This one mistake can prejudice your career.

Collocations with prejudice:
The word prejudice often collocates with adjectives: deep, strong, unfair, verbs: have, hold, and prepositions: about, against.
It is very difficult to deal with strong prejudices.
Almost everybody holds some prejudices.
Prejudice against homosexuals is still common in eastern European countries.

Incorrect spelling, explanation: the word prejudice is known for its difficult spelling and pronunciation. Due to the latter one, many users of English assume that there is an extra -d letter in the middle of the word, before -j, which gives the form predjudice. This assumption, however, is wrong and the only correct version is prejudice.