Deleterious
Part of speech: adjective
Definition: harmful or hurtful, to physical, mental or moral health.
Hurtful
Part of speech: adjective
Definition: Tending to impair or damage; injurious; mischievous; occasioning loss or injury; causing pain or suffering.
Example sentence: Christlike communications are expressed in tones of love rather than loudness. They are intended to be helpful rather than hurtful. They tend to bind us together rather than to drive us apart. They tend to build rather than to belittle.