harmful adj.

VERBS be | become | consider sth She actually considered fresh air harmful.

ADV. extremely, particularly, positively, very These products are often positively harmful. | quite | possibly, potentially A lot of these chemicals are potentially very harmful. | allegedly | (not) necessarily Not all virus infections are necessarily harmful to vines. | intrinsically | environmentally, socially These pesticides are environmentally harmful.

PREP. to pesticides that are harmful to the environment