hurtful

ilkeä, pahansuopa, loukkaava

haitallinen Tending to impair or damage; injurious; mischievous; occasioning loss or injury.
1649: w:John Milton|John Milton, Eikonoklastes

A good principle not rightly understood may prove as hurtful as a bad.

Well-cultivated soils are often healthy; nor at present has it been proved that the use of manure is hurtful.