Prejudicial
PREJUDI'CIAL, adjective Biased or blinded by prejudices; as a prejudicial eye. [Not in use.]
1. Hurtful; mischievous; injurious; disadvantageous; detrimental; tending to obstruct or impair. A high rate of interest is prejudicial to trade and manufactures. Intemperance is prejudicial to health.
His going away the next morning with all his troops, was most prejudicial to the king's affairs.
One of the young ladies reads while the others are at work; so that the learning of the family is not at all prejudicial to its manufactures.