/ ˌpredʒuˈdɪʃl; NAmE / adjective
prejudicial (to sth) ( formal ) harming or likely to harm sb/sth
SYN damaging :
developments prejudicial to the company's future
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WORD ORIGIN
late Middle English : from Old French prejudiciel , from prejudice , from Latin praejudicium , from prae in advance + judicium judgement.